Table 2.

Quality assessment of included studies according to the CONSORT checklist

Item No.	Hirtz et al. [24]	Mirzamoradi et al. [27]	Crowther et al. [10]	Mittendorf et al. [30]	Horton et al. [25]	Rouse et al. [29]	Marret et al. [26]
1a	No	Yes	Yes	No	No	Yes	Yes
1b	Yes	Yes	Yes	Yes	Yes	Yes	Yes
2a	Yes	Yes	Yes	No	Yes	Yes	No
2b	Yes	Yes	No	No	Yes	No	Yes
3a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3b	Yes	Yes	Yes	No	Yes	Yes	Yes
4a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
4b	Yes	Yes	No	Yes	Yes	Yes	Yes
5	Yes	Yes	Yes	Yes	Yes	Yes	Yes
6a	Yes	Yes	Yes	Yes	Yes	No	Yes
6b	No	No	No	No	No	No	No
7a	No	Yes	No	Yes	No	Yes	Yes
7b	No	No	Yes	No	No	Yes	Yes
8a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
8b	No	No	Yes	No	No	No	Yes
9	No	No	Yes	No	No	No	Yes
10	No	No	Yes	No	No	No	Yes
11a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
11b	No	No	No	No	No	Yes	Yes
12a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
12b	No	No	No	No	No	Yes	No
13a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
13b	Yes	Yes	No	No	No	No	No
14a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
14b	Yes	Yes	Yes	Yes	Yes	Yes	Yes
15	No	Yes	Yes	Yes	Yes	Yes	Yes
16	Yes	Yes	Yes	Yes	Yes	Yes	Yes
17a	Yes	Yes	Yes	Yes	Yes	Yes	Yes
17b	No	No	No	No	No	No	No
18	Yes	Yes	No	Yes	No	No	No
19	No	No	Yes	No	No	No	No
20	Yes	No	Yes	Yes	Yes	Yes	No
21	No	No	No	No	No	No	No
22	Yes	Yes	Yes	Yes	Yes	Yes	Yes
23	Yes	No	No	No	No	No	Yes
24	No	No	No	No	No	Yes	No
25	No	No	No	No	No	No	No
Total	22	23	24	19	20	24	26