Prophylactic fixation of the unaffected contralateral side in children with slipped capital femoral epiphysis seems favorable: A systematic review

Table 1 Incidence and follow-up of symptomatic contralateral slipped capital femoral epiphysis in the literature

Ref.	Incidence	Time between slips in mo	Follow-up in mo	Minors score
Greenough et al[57]	16 of 61 (26%)	NA1	NA	8 of 16
Hägglund et al[14]	32 of 237 (14%)	NA	NA	10 of 16
Jensen et al[30]	9 of 57 (16%)	NA	264 (median)	9 of 16
Segal et al[23]	9 of 13 (69%)	14 (mean)	37 (mean)	15 of 24
Hurley et al[32]	61 of 169 (36%)	NA	34 (mean)	10 of 16
Stasikelis et al[49]	20 of 50 (40%)	10 (mean)	34 (mean)	13 of 16
Stott and Bidwell[29]	56 of 171 (33%)	77% < 12	24 (mean)	7 of 16
MacLean and Reddy[21]	9 of 53 (17%)	13 (mean)	NA	6 of 16
Koenig et al[58]	12 of 71 (17%)	NA	60 (mean)	9 of 16
Lehmann et al[33]	15 of 62 (24%)	6 (mean)	72 (mean)	8 of 16
Baghdadi et al[22]	20 of 133 (15%)	12 (mean)	192 (mean)	9 of 16
Kohno et al[59]	11 of 65 (17%)	NA	36 (mean)	15 of 24
Phillips et al[60]	42 of 132 (32%)	NA	24 (mean)	11 of 16
Bhattacharjee et al[43]	10 of 36 (28%)	NA	36 (mean)	15 of 24
Boyle et al[61]	45 of 168 (27%)	NA	44 (mean)	11 of 16
Wensaas et al[52]	6 of 22 (27%)	NA	33 (mean)	9 of 16
Nowicki et al[24]	45 of 496 (9%)	NA	40 (mean)	19 of 24
Herngren et al[37]	43 of 201 (21%)	NA	36 (mean)	14 of 16
Balch Samora et al[50]	11 of 33 (33%)	NA	20 (mean)	11 of 16
Tucker et al[13]	11 of 40 (28%)	6 (mean)	24 (minimum)	10 of 16
Chan et al[62]	7 of 43 (16%)	11 (mean)	18 (mean)	9 of 16
Maranho et al[63]	70 of 318 (22%)	42 (median)	18 (minimum)	13 of 16
Tomaru et al[64]	3 of 34 (9%)	NA	58 (mean)	6 of 16
Swarup et al[28]	1077 of 9755 (11%)	9 (mean), 88% < 18	24 (minimum)	8 of 16
Maranho et al[65]	40 of 250 (28%)	NA	49 (mean)	14 of 16
Yildirim et al[66]	82 of 227 (36%)	7 (mean)	26 (mean)	9 of 16
Total	1762 of 12897 (14%)	Average: 9 (n = 1250)	Average: 46	Average: 63%

¹NA: Not available.