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Table 1 Effect estimates of Chinese herbal medicines for recurrent miscarriage in 41 randomized trials

From: Chinese herbal medicine for the treatment of recurrent miscarriage: a systematic review of randomized clinical trials

Outcomes and comparisons

Effect estimate (Random effect model, 95% CI)

Studies

Participants

Study ID

Live birth rate

    

CHM vs CM

    

CHM vs progesterone-based treatment

RR 1.31 [1.13, 1.52]*∆

4

481

Feng [38], Li [20], Yan [35], Zhu [25]

CHM vs progesterone plus hCG-based treatment

RR 1.25 [1.06, 1.47]*

1

158

Feng [45]

CHM vs CM with uncertain effect

RR 0.97 [0.41, 2.33]

3

214

Huang [41], Li [18], Wang [26]

CHM plus CM vs CM

    

CHM plus CM vs progesterone-based treatment

RR 1.17 [1.06, 1.29]*∆

4

315

Huang [22], Li [46], Li [27], Pan [47]

CHM plus CM vshCG-based treatment

RR 1.20 [1.01, 1.43]*

1

75

He WH [19]

CHM plus CM vs progesterone plus hCG-based treatment

RR 1.08 [0.93, 1.25]

3

148

Cai [48], Tian [16], Zhao [23]

CHM plus CM vs CM with uncertain effect

RR 1.55 [1.16, 2.08]*∆

5

485

He GY [21], Shu [11], Sun [40], Xie [34], Ye [9]

Embryonic developmental state

    

CHM vs CM

    

CHM vs progesterone-based treatment

RR 1.43 [1.02, 1.99]*∆

3

253

Wu [32], Xu [33], Yang [36]

CHM vs CM with uncertain effect

RR 1.33 [0.99, 1.77]∆

6

515

Ban [39], Liu [24], Luo [17], Tang [12], Tian [29], Zhao [49]

CHM plus CM vs CM

    

CHM plus CM vs progesterone-based treatment

RR 1.55 [1.23, 1.94]*∆

2

191

Yang [14], Zou [42]

CHM plus CM vs progesterone plus hCG-based treatment

RR 1.18 [1.05, 1.33]*∆

4

252

Hou [31], Li [10], Wang [30], Wang [37]

CHM plus CM vs CM with uncertain effect

RR 1.47 [1.03, 2.10]*

5

349

Fan [43], Li [44], Liu [15], Zhang [28], Zhou [13]

  1. Abbreviations: CI confidence interval, *the effect estimate favors experimental group; ∆, result from Meta-analysis; CHM Chinese herbal medicine, CM conventional medicine, hCG human chorionic gonadotrophin.