Coronary heart disease (CHD) complicated with mental and psychological disorders such as insomnia is called ‘double heart disease’. The persistent existence of mental and psychological problems such as insomnia can induce the onset of CHD or aggravate the development of the disease, resulting in poor prognosis [1]. Insomnia is a kind of sleep disorder, which makes it difficult to fall asleep or wake up easily after sleeping, and makes it difficult to sleep all night. The initiation and maintenance of sleep are hindered, which seriously affects the quality of life of patients. At present, Western medicine still lacks reliable treatment methods, and sedatives and sleeping pills are the main treatment methods, but their addiction and adverse reactions are difficult to solve [2]. Traditional Chinese Medicine believes that this is caused by yangqi not entering yinqi, disharmony between yingqi and weiqi, and imbalance of viscera [3]. It is closely related to CHD like ‘xiongbi’ and ‘xintong’. Traditional Chinese Medicine has little adverse reaction and less dependence in treating insomnia. And the patients treated by Traditional Chinese Medicine(TCM) therapies have good compliance and remarkable clinical efficacy [4]. In recent years, there have been literature reports on treating CHD complicated with insomnia by TCM therapies, but the sample size was small and the relevant evidence-based evaluation was insufficient. At the same time, due to the wide variety of TCM therapies, different emphasis on efficacy and lack of direct comparative study between different TCM therapies, it is impossible to evaluate the efficacy of various TCM therapies for CHD complicated with insomnia. In this study, the efficacy of different TCM therapies and sedative-hypnotics in treating CHD complicated with insomnia was compared by the method of Network Meta-analysis, and intervention measures were sorted according to the efficacy, in order to provide evidence-based medicine evidence for clinical treatment plan. The report standard of this study refers to the report standard of International Society for Pharmacoeconomics and Outcomes Research (ISPOR) Network Meta-analysis [5].
Methods
Inclusion criteria
(1) The study type is randomized clinical trial (RCT) or semi-RCT; (2) The subjects are patients with CHD complicated with insomnia, and the diagnosis of insomnia refers to Chinese Classification and Diagnostic Criteria for Mental Disorders [6]; (3) Interventions involve TCM therapy, such as traditional Chinese medicine compound, Chinese patent medicine, Chinese medicine fumigation, acupuncture, massage, five tones, acupoint application, traditional techniques, etc.
Exclusion criteria
(1) Repeated reporting of literature; (2) The outcome index does not contain the total effective rate of insomnia; (3) The key data is missing, and the complete data cannot be obtained after contacting the author.
Search Strategy
Databases including China National Knowledge Infrastructure (CNKI), Chinese Biomedical Database (CBM), Wanfang data Information Site, VIP information resource integration service platform, PubMed, Web of Science, EMBase and the Cochrane Library were searched from inception to September 2018. The search terms used were as follows: Coronary heart disease, Insomnia, Traditional Chinese medicine, Acupuncture, Tuina, Qigong, etc.
Study Selection and Data Extraction
Two researchers independently screening articles, extracting data and cross-checking data combining the criteria of literature inclusion and exclusion. Differences were decided through discussion or arbitration by the third researcher. Data extraction includes: first author, publication time, age, sample size, treatment methods, outcome indicators, etc. The outcome index is expressed by the total effective rate of insomnia, and the calculation formula is: total effective rate = (Cured cases + Significant effective cases + Effective cases)/Total cases ×100%. The effect of insomnia was evaluated according to the Guiding Principles of Clinical Research on New Traditional Chinese Medicine: (1) Cured cases: the sleep time returned to normal or the night sleep time was > 6 h, and the sleep was deep and energetic after waking up; (2) Significant effective cases: sleep improved obviously, sleep time increased by more than 3h, and sleep depth increased; (3) Effective cases: the symptoms were relieved, and the sleep time was increased by < 3h; (4) Ineffective cases: Insomnia was not significantly improved or aggravated after treatment [7]. Other recognized evaluations of insomnia efficacy are consulted too. The quality evaluation was conducted by two researchers with reference to Cochrane risk assessment tool [8].
Data Analysis
Statistical analysis is performed with Rev Man 5.3, Stata 15.1 and ADDIS 1.16.8 software. Counting data are expressed by OR and its 95% confidence interval (CI), while the logOR and its 95%CI is used in the network meta-analysis with sedative hypnotic drugs plus routine treatment as common control. The χ2 test is used to analyze the heterogeneity, and I2 is used to evaluate the heterogeneity [9]. When I2 ≤ 50%, which means the heterogeneous less, the fixed effect model is selected for meta-analysis. Excluding the influence of significant clinical heterogeneity when I2>50%, which means the heterogeneity big. If the heterogeneity is still big, the random effect model is used for meta-analysis [10]. When there is a closed loop, the consistency between direct comparison and indirect comparison tested with the consistency test. When the inconsistency factor (IF) of consistency test is close to 0 or the odds ratio of hypothesis test (ROR) is close to 1, it is considered that the direct and indirect evidences are consistent [11]. Funnel diagram was used to identify whether there is small sample effect evaluation. Four Markov chains are used to set the initial value. The number of iterations of initial updating is 50000, and the number of iterations of continuous updating is 20000. The first 50000 anneals are used to eliminate the influence of the initial value. When the potential scale reduction factor (PSRF) tends to 1, it is considered that the convergence degree is satisfactory [12]. The probability of each intervention being the best one is presented by ranking probability. A P-value of < 0.05 is considered statistically significant.
Results
Search Results
A total of 498 related articles were obtained in the initial examination, and 21 RCT [13-33] were included after selected layer by layer in the end. A total of 2496 patients with CHD complicated with insomnia were included. Eleven kinds of intervention measures were involved specifically: 1) moxa plus routine treatment, 2) baduanjin plus massage and routine treatment, 3) massage plus five-tone therapy and routine treatment, 4) finger-pressure therapy plus routine treatment, 5) yangxinshi tablet plus acupuncture and routine treatment, 6) Chinese patent medicine plus routine treatment, 7) compound Chinese medicine plus routine treatment, 8) compound Chinese medicine plus massage, five-tone therapy and routine treatment, 9) fumigation and washing plus routine treatment, 10) routine treatment, 11) sedative hypnotic drugs plus routine treatment. The flow chart of literature screening and result was shown in Figure 1. General data of the included studies was shown in Table 1. The baseline situation of the 21 included studies had been statistically analyzed and comparable. Quality evaluation of the included studies was shown in Table 2.
Table 1The general data of the included studies
Study
|
Age(year)
|
Sample(n)
|
Treatment
|
Outcome
|
|
c
|
e
|
c
|
e
|
c
|
e
|
Zhou Meier 2015
|
51.7±12.7
|
51.4±13.0
|
73
|
73
|
J
|
A
|
▲
|
Yu Xuelian 2017
|
71.0± 5.1
|
71.0 ± 5.4
|
60
|
60
|
J
|
B
|
▲
|
Li Haiyan 2017
|
NA
|
NA
|
40
|
40
|
K
|
C
|
▲
|
Hu Yanning 2011
|
52.0±13.1
|
52.8±3.2
|
40
|
40
|
J
|
D
|
▲
|
Zhang Jun 2011
|
43.3±5.2
|
42.5±6.5
|
40
|
40
|
K
|
E
|
▲
|
Wang Lin 2016
|
53.8±6.8
|
51.2±5.2
|
60
|
59
|
J
|
F
|
▲
|
Ma Yan 2017
|
73.0±5.0
|
70.0±6.0
|
40
|
40
|
K
|
F
|
▲
|
Xu Yali 2015
|
64.2
|
63.2
|
100
|
100
|
K
|
F
|
▲
|
Zhai Shumin 2016
|
56.6±15.3
|
54.2±14.7
|
26
|
26
|
K
|
F
|
▲
|
Xue Zheng 2012
|
42~80
|
42~80
|
50
|
50
|
K
|
F
|
▲
|
Zhang Chunrong 2018
|
54.2±9.6
|
55.7±8.2
|
60
|
60
|
K
|
F
|
▲
|
Wang Zhuo 2011
|
53.0±5.0
|
52.0±6.0
|
100
|
100
|
K
|
F
|
▲
|
Zhang Xiangsu 2011
|
62.6±6.5
|
62.6±6.5
|
30
|
30
|
K
|
F
|
▲
|
Zhang Xiangrong 2016
|
67.3±6.8
|
70.5±8.1
|
160
|
160
|
K
|
G
|
▲
|
Wang Chuanfang 2018
|
67.7±10.0
|
68.4±8.4
|
53
|
53
|
J
|
G
|
▲
|
Wang Jian 2010
|
54.8±3.8
|
59.3±6.1
|
33
|
35
|
K
|
G
|
▲
|
Chen Xunshan 2018
|
73.2±11.2
|
72.8±12.2
|
45
|
45
|
K
|
G
|
▲
|
Ren Dewang 2011
|
66.9±10.2
|
65.2±11.8
|
39
|
39
|
K
|
G
|
▲
|
Yang Jiao 2015
|
NA
|
NA
|
40
|
80
|
K
|
G
|
▲
|
Liu Jinglu 2017
|
NA
|
NA
|
40
|
40
|
G
|
H
|
▲
|
Xu Yinli 2014
|
47.9±7.7
|
48.4±6.5
|
98
|
99
|
K
|
I
|
▲
|
NA, missing value; c, Control group; e, Experimental group; A, moxa plus routine treatment; B, baduanjin plus massage and routine treatment; C, massage plus five-tone therapy and routine treatment; D, finger-pressure therapy plus routine treatment; E, yangxinshi tablet plus acupuncture and routine treatment; F, Chinese patent medicine plus routine treatment; G, compound Chinese medicine plus routine treatment; H, compound Chinese medicine plus massage, five-tone therapy and routine treatment; I, fumigation and washing plus routine treatment; J, routine treatment; K, sedative hypnotic drugs plus routine treatment; ▲, total effective rate of insomnia.
Table 2Quality evaluation of the included studies
Study
|
Random sequence generation
|
Allocation concealment
|
Blind method
|
Quit or lose visit
|
Complete outcome data
|
Selective reporting
|
Other bias
|
Zhou Meier 2015
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Yu Xuelian 2017
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Li Haiyan 2017
|
High risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Hu Yanning 2011
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Zhang Jun 2011
|
Unclear risk of bias
|
Unclear risk of bias
|
High risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Wang Lin 2016
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Ma Yan 2017
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Xu Yali 2015
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Zhai Shumin 2016
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Xue Zheng 2012
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Zhang Chunrong 2018
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Wang Zhuo 2011
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Zhang Xiangsu 2011
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Zhang Xiangrong 2016
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Wang Chuanfang 2018
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Wang Jian 2010
|
Unclear risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Chen Xunshan 2018
|
High risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Ren Dewang 2011
|
High risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Yang Jiao 2015
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Liu Jinglu 2017
|
High risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Xu Yinli 2014
|
Low risk of bias
|
Unclear risk of bias
|
Unclear risk of bias
|
Low risk of bias
|
Low risk of bias
|
Low risk of bias
|
Unclear risk of bias
|
Table 3 Network meta-analysis of the overall efficacy of 11 intervetnions for insomnia in patients with coronary heart disease
OR
|
A
|
B
|
C
|
D
|
E
|
F
|
G
|
H
|
I
|
J
|
K
|
A
|
1.00
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
B
|
1.69
(0.15,20.14)
|
1.00
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
C
|
0.32
(0.01,7.56)
|
0.19
(0,5.04)
|
1.00
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
D
|
1.65
(0.18,19.29)
|
0.96
(0.09,11.66)
|
5.10
(0.23,213.00)
|
1.00
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
E
|
1.28
(0.07,21.50)
|
0.78
(0.04,15.58)
|
3.87
(0.17,150.34)
|
0.79
(0.04,12.48)
|
1.00
|
-
|
-
|
-
|
-
|
-
|
-
|
F
|
1.55
(0.21,12.94)
|
0.93
(0.11,8.83)
|
4.45
(0.44,120.74)
|
0.98
(0.13,6.59)
|
1.18
(0.16,12.01)
|
1.00
|
-
|
-
|
-
|
-
|
-
|
G
|
2.07
(0.29,15.42)
|
1.20
(0.16,12.15)
|
5.92
(0.59,172.50)
|
1.25
(0.18,9.01)
|
1.58
(0.21,16.59)
|
1.32
(0.58,3.28)
|
1.00
|
-
|
-
|
-
|
-
|
H
|
0.09
(0,1.73)
|
0.05
(0,1.44)
|
0.25
(0,21.61)
|
0.06
(0,1.00)
|
0.07
(0,1.92)
|
0.06
(0,0.66) a
|
0.05
(0,0.46) a
|
1.00
|
-
|
-
|
-
|
I
|
3.62
(0.29,36.10)
|
2.13
(0.17,28.92)
|
10.73
(0.72,367.56)
|
2.21
(0.20,20.78)
|
2.78
(0.27,35.65)
|
2.28
(0.54,9.95)
|
1.75
(0.38,7.21)
|
39.83
(2.51,1 603.66) a
|
1.00
|
-
|
-
|
J
|
9.98
(2.12,57.66) a
|
5.87
(1.11,39.05) a
|
30.00
(2.33,902.39) a
|
6.05
(1.22,30.95) a
|
7.58
(0.81,96.78)
|
6.21
(2.13,22.65) a
|
4.76
(1.61,16.01) a
|
108.22
(8.50,4 149.32) a
|
2.74
(0.52,17.52)
|
1.00
|
-
|
K
|
7.55
(1.00,60.65)
|
4.35
(0.50,45.33)
|
21.44
(2.24,564.61) a
|
4.59
(0.60,32.40)
|
5.69
(0.83,52.64)
|
4.74
(2.55,9.07) a
|
3.62
(1.77,6.96) a
|
80.32
(7.38,2 783.96) a
|
2.09
(0.56,7.76)
|
0.76
(0.21,2.26)
|
1.00
|
-, repeating data; aP<0.05
Table 4Ranking of total effective rate of insomnia in patients with coronary heart disease
Rank
|
A
|
B
|
C
|
D
|
E
|
F
|
G
|
H
|
I
|
J
|
K
|
1
|
0.03
|
0.01
|
0.23
|
0.01
|
0.03
|
0.00
|
0.00
|
0.69 a
|
0.00
|
0.00
|
0.00
|
2
|
0.15
|
0.07
|
0.39 a
|
0.06
|
0.11
|
0.01
|
0.00
|
0.21
|
0.01
|
0.00
|
0.00
|
3
|
0.23 a
|
0.13
|
0.16
|
0.14 a
|
0.18 a
|
0.07
|
0.02
|
0.05
|
0.02
|
0.00
|
0.00
|
4
|
0.2
|
0.14*
|
0.08
|
0.14 a
|
0.15
|
0.18
|
0.07
|
0.02
|
0.03
|
0.00
|
0.00
|
5
|
0.12
|
0.12
|
0.05
|
0.13
|
0.11
|
0.25 a
|
0.15
|
0.01
|
0.05
|
0.00
|
0.00
|
6
|
0.09
|
0.1
|
0.03
|
0.13
|
0.09
|
0.25 a
|
0.23
|
0.00
|
0.07
|
0.00
|
0.00
|
7
|
0.07
|
0.12
|
0.02
|
0.13
|
0.09
|
0.16
|
0.27 a
|
0.00
|
0.11
|
0.00
|
0.01
|
8
|
0.06
|
0.14 a
|
0.02
|
0.12
|
0.11
|
0.07
|
0.21
|
0.00
|
0.21
|
0.02
|
0.04
|
9
|
0.03
|
0.1
|
0.01
|
0.09
|
0.08
|
0.01
|
0.05
|
0.00
|
0.39 a
|
0.08
|
0.16
|
10
|
0.01
|
0.05
|
0.00
|
0.04
|
0.03
|
0.00
|
0.00
|
0.00
|
0.08
|
0.26
|
0.53 a
|
11
|
0.00
|
0.01
|
0.00
|
0.01
|
0.02
|
0.00
|
0.00
|
0.00
|
0.05
|
0.64 a
|
0.26
|
a, the most likely ranking of interventions
Traditional Meta-analysis
The results of traditional meta-analysis of total effective rate of insomnia showed that there were significant differences between Chinese patent medicine plus routine treatment and sedative hypnotic drugs plus routine treatment [OR = 4.47,95% CI (2.78,7.20)]. There were significant differences between compound Chinese medicine plus routine treatment and sedative hypnotic drugs plus routine treatment [OR = 4.28,95% CI (2.77,6.62)]. There was only one study in other each pairwise direct comparison items, so meta-analysis was not performed. Excluding each study one by one, the OR values of the combined effects were still within 95%CI of the total combined effects, with no directional change and no significant change in statistical heterogeneity, suggesting that the results of this study were relatively stable.
Network Meta-analysis
Network relationship
The network relationship of included intervention measures was shown in Figure2. Generally speaking, it is a star structure with 11 intervention nodes and no closed loop, centering on sedative hypnotic drugs plus routine treatment. One study [31] is a three-arm study with two experimental groups were both compound Chinese medicine plus routine treatment. So, we merged the two experimental groups into one group. As a result, the total number of arms in 21 articles was 42. There was a connection between nodes indicating that there was evidence of direct comparison between the two interventions. There were no connection nodes indicating that there was no direct comparison, which can be indirectly compared through network meta-analysis. There were 11 kinds of intervention measures involved in this study, among which the number of studies comparing Chinese patent medicine plus routine treatment with sedative hypnotic drugs plus routine treatment is the largest. The intervention measure with the largest total sample size was sedative hypnotic drugs plus routine treatment.
Consistency test
In this study, interventions did not form a closed loop, so consistency test was unnecessary.
Evaluation of small sample effect
The funnel chart was used to evaluate the publication bias of 21 included studies. We found one study [15] fell outside 95%CI, while the other 20 articles all fell within 95%CI. The included studies were distributed symmetrically on both sides of the vertical line X=0 and the regression line was relatively horizontal, which indicated that there was little possibility of small sample effect in the study (Figure 3).
Convergence diagnosis
Four Markov chains were used. The PSRF tends to 1 and reaches stability after 50000 simulation iterations, 20000 adjustment iterations and 10 refinement iterations, which indicates that the convergence degree of the model is satisfactory.
Network Meta-analysis results
All of 21 studies reported the total effective rate of insomnia. Firstly, the network meta-analysis was carried out with sedative hypnotic drugs plus routine treatment as common control. The results showed that massage plus five-tone therapy and routine treatment, Chinese patent medicine plus routine treatment, compound Chinese medicine plus routine treatment, compound Chinese medicine plus massage, five-tone therapy and routine treatment were superior to sedative hypnotic drugs plus routine treatment. The differences were statistically significant (P<0.05, Figure 4). Then Bayesian network meta-analysis was performed. The results shown that moxa plus routine treatment, baduanjin plus massage and routine treatment, massage plus five-tone therapy and routine treatment, finger-pressure therapy plus routine treatment, Chinese patent medicine plus routine treatment, compound Chinese medicine plus routine treatment, compound Chinese medicine plus massage, five-tone therapy and routine treatment were superior to routine treatment. At the same time, massage plus five-tone therapy and routine treatment, Chinese patent medicine plus routine treatment, compound Chinese medicine plus routine treatment, compound Chinese medicine plus massage, five-tone therapy and routine treatment were superior to sedative hypnotic drugs plus routine treatment. The compound Chinese medicine plus massage, five-tone therapy and routine treatment was superior to Chinese patent medicine plus routine treatment, compound Chinese medicine plus routine treatment, fumigation and washing plus routine treatment. The differences were statistically significant (P<0.05, Table 3).
Rank results
The total effective rate of insomnia of intervention was shown in Table 4. According to the results in Table 3, the order from superior to inferior was: compound Chinese medicine plus massage, five-tone therapy and routine treatment; massage plus five-tone therapy and routine treatment; moxa plus routine treatment; yangxinshi tablet plus acupuncture and routine treatment; finger-pressure therapy plus routine treatment; Chinese patent medicine plus routine treatment; baduanjin plus massage and routine treatment; compound Chinese medicine plus routine treatment; fumigation and washing plus routine treatment; sedative hypnotic drugs plus routine treatment; routine treatment.
Discussion
A total of 21 studies were included in our research, involving 2496 patients with CHD complicated with insomnia. A total of 11 kinds of different interventions were included, including 9 kinds of TCM therapy. The results of traditional meta-analysis show that Chinese patent medicine plus routine treatment and compound Chinese medicine plus routine treatment were superior to sedative hypnotic drugs plus routine treatment. The effectiveness of different TCM therapies and sedative hypnotic drugs in treating CHD complicated with insomnia were compared with Bayesian network meta-analysis. The results showed that TCM therapy were superior to routine treatment except yangxinshi tablet plus acupuncture and routine treatment and fumigation and washing plus routine treatment. At the same time, massage plus five-tone therapy and routine treatment, Chinese patent medicine plus routine treatment, compound Chinese medicine plus routine treatment, compound Chinese medicine plus massage, five-tone therapy and routine treatment were superior to sedative hypnotic drugs plus routine treatment. The top 3 interventions of ranks were compound Chinese medicine plus massage, five-tone therapy and routine treatment, massage plus five-tone therapy and routine treatment, moxa plus routine treatment. The compound Chinese medicine plus massage, five-tone therapy and routine treatment which was the first order was superior to Chinese patent medicine plus routine treatment, compound Chinese medicine plus routine treatment, fumigation and washing plus routine treatment. The last 2 interventions of ranks were sedative hypnotic drugs plus routine treatment, routine treatment. The specific rank from superior to inferior was as follows: compound Chinese medicine plus massage, five-tone therapy and routine treatment; massage plus five-tone therapy and routine treatment; moxa plus routine treatment; yangxinshi tablet plus acupuncture and routine treatment; finger-pressure therapy plus routine treatment; Chinese patent medicine plus routine treatment; baduanjin plus massage and routine treatment; compound Chinese medicine plus routine treatment; fumigation and washing plus routine treatment; sedative hypnotic drugs plus routine treatment; routine treatment. The interpretation of the rank should be combined with the results of meta-analysis.
Patients with CHD complicated with insomnia exist widely in clinic. It can be proved that insomnia is closely related to CHD from both TCM theory and modern medicine [34]. Insomnia complicated or secondary to CHD has become an independent risk factor of cardiovascular disease, which affects the recovery of cardiac function and has a bad prognosis for patients. CHD in modern medicine belongs to ‘xiongbi’, ‘xintong’ and ‘xinji’ in traditional Chinese medicine, while insomnia in modern medicine belongs to ‘bumei’, ‘budemei’ and ‘mubuming’ in traditional Chinese medicine. As early as ‘Huangdi Neijing’, the double-heart theory of ‘heart governing blood vessels’ and ‘heart governing gods’ were expounded. Therefore, CHD complicated with insomnia should be treated with the principle of ‘treating with both hearts’, and with the treatment of tonifying deficiency, purging excess and regulating the mind [35]. The ‘holistic concept’ of traditional Chinese medicine has unique advantages and status in the diagnosis and treatment of CHD complicated with insomnia, which has a good therapeutic effect on CHD complicated with insomnia. However, there still was lacking rigorous evidence-based medicine research and standardized experimental research. So, further studies need to be carried out [36]. In this study, through the method of network meta-analysis, the curative effects of TCM therapy and sedative hypnotics on CHD complicated with insomnia were preliminarily compared. Results confirmed that the total effective rate of Chinese medicine therapy on CHD complicated with insomnia was higher. This study provided new ideas and evidence for clinical treatment of CHD complicated with insomnia. However, due to the high risk of bias in the original study, the related results are not stable at present. It is impossible to form a standardized clinical guidance for the time being. Therefore, multi-center, large sample and high-quality researches should be organized in the later stage to further clarify the effectiveness and safety of TCM therapy for patients with CHD complicated with insomnia, and to clarify its clinical feasibility, so as to achieve the initial purpose of guiding clinical practice.
The effectiveness of TCM therapy for CHD complicated with insomnia was compared by the method of network meta-analysis. The results of small sample effect evaluation and sensitivity analysis indicate that the results were stable. However, the limitations of this study should not be ignored: (1) All the studies included were Chinese articles, which may lead to the language bias existed; (2) The number of studies involved was small and the sample sizes were insufficient, which may lead to the decrease of statistical efficiency; (3) The low quality of the included studies affected the authenticity and reliability of the results, which may lead to the reduction of inspection efficiency; (4) The long-term effect of TCM therapy on CHD with insomnia could not be evaluated due to the limitation of included studies; (5) There were few safety reports, which cannot form reliable safety evidence. Therefore, in the future, multi-center, large-sample, and high-quality researches can be organized to further clarify the effectiveness and safety of TCM therapies in the treatment of CHD complicated with insomnia and define its clinical feasibility, to achieve the initial purpose of guiding clinical practice.
Conclusion
In conclusion, the effectiveness of the 9 TCM therapies in CHD complicated with insomnia has shown certain advantages. Among the 9 TCM therapies, compound Chinese medicine plus massage, five-tone therapy and routine treatment may be the most effective treatment. In addition, the conclusions of this study still need to be verified by more high-quality, multi-center and large-sample RCTs. Given the limitations of this study, the application of the conclusions of this study should be carefully selected.
Author contributions
ZHENG Yawei carried out research implementation and feasibility analysis, statistical processing, analysis and interpretation of results. ZHENG Yawei, WU Lifei and GU Dongmei collected data. ZHENG Yawei, WU Lifei and ZHANG Xingxing carried out data collation. ZHENG Yawei and WU Lifei wrote the paper. ZHENG Yawei and ZHANG Xingxing revised the paper. ZHANG Siqi and LIU Ming took charge of the quality control and revision of articles. ZHENG Yawei and FANG Zhuyuan took charge of the article and supervised the article.
Conflicts of Interest
The authors declare no conflicts of interest in any aspects.
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