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Table 2 Included study characteristics for non-Cochrane child-relevant systematic reviews published in 2014, overall and by type of review question

From: A descriptive analysis of non-Cochrane child-relevant systematic reviews published in 2014

Included study characteristics

Overall (n = 1598)

Type of review questiona

Therapeutic (n = 753)

Epidemiology (n = 701)

Diagnostic/ Prognostic (n = 91)

Other (n = 53)

Study designs: eligible, n (%)

 Only RCTs

203 (12.7)

202 (26.8)

1 (0.1)

0 (0.0)

0 (0.0)

 RCTs and other designs

765 (47.9)

476 (63.2)

240 (34.2)

31 (34.1)

18 (34.0)

 Only non-RCTs

472 (29.5)

49 (6.5)

346 (49.4)

48 (52.7)

29 (54.7)

 Unclear or not reported

158 (9.9)

26 (3.5)

114 (16.3)

12 (13.2)

6 (11.3)

Study designs: included in the review, n (%)

 Only RCTs

231 (14.5)

227 (30.1)

1 (0.1)

0 (0.0)

0 (0.0)

 RCTs and other designs

420 (26.3)

334 (44.4)

66 (9.4)

13 (14.3)

7 (13.2)

 Only non-RCTs

796 (49.8)

169 (22.4)

523 (74.6)

71 (78.0)

36 (67.9)

 Not applicable (empty)

4 (0.3)

4 (0.5)

0 (0.0)

0 (0.0)

0 (0.0)

 Unclear or not reported

147 (9.2)

19 (2.5)

111 (15.8)

7 (7.7)

10 (18.9)

Included studies, median (IQR)

19 (11, 33)

15 (9, 26)

23 (13, 40)

18 (12, 28)

20 (12, 41)

Reported on the number of participants, n (%)b

692 (43.4)

370 (49.4)

273 (38.9)

41 (45.1)

8 (15.1)

Included participants, median (IQR)

2134 (648, 13,079)

1042 (427, 3324)

11,038 (2098, 63,897)

1086 (515, 2831)

2036 (1284, 5374)

Participant type

 Children only

628 (39.3)

353 (46.9)

212 (30.2)

41 (45.1)

25 (47.2)

 Children and adults

787 (49.2)

335 (44.5)

384 (54.8)

46 (50.5)

27 (50.9)

 Pregnancy

176 (11.0)

65 (8.6)

99 (14.1)

4 (4.4)

0 (0.0)

 Adults onlyc

7 (0.4)

0 (0.0)

6 (0.9)

0 (0.0)

1 (1.9)

  1. IQR interquartile range
  2. aBased on the classification system previously suggested by Page et al. [9]
  3. bThe denominator excludes empty reviews which included no participants (n = 4, all therapeutic)
  4. c These studies were relevant to child health but included adults only (e.g., outcomes in adults related to an exposure in childhood; intended to include both children and adults but no studies with children were found)