Operative versus conservative treatment for patellar dislocation: a meta-analysis of 7 randomized controlled trials

Table 3 The results of pooled analysis

Outcome	Study	Risk ratio effect/Mean difference(95%CI)		P Value	Heterogeneity
Outcome	Study	Random effects	Fixed effects	P Value	I ²	P Value
Frequency of recurrent dislocation	[2, 7–9, 23–26]	0.73 [0.46, 1.16]	0.70 [0.53, 0.92]	0.01	43%	0.12
Frequency of recurrent instability/subluxation	[2, 7–9, 23, 24]	0.67 [0.25, 1.80]	0.98 [0.75, 1.28]	0.86	57%	0.07
Patient satisfaction (excellent/good)	[7, 23–25]	0.84 [0.71, 1.00]	0.84 [0.70, 1.00]	0.05	0	0.93
Frequency subsequent surgery required	[8, 25]	0.74 [0.15, 3.70]	0.94 [0.53, 1.66]	0.82	41%	0.19
Kujala score	[2, 7–9, 23–26]	6.38 [-5.32, 18.08]	9.40 [8.18, 10.61]	0.29	98%	<0.00001
Hughston VAS	[23–25]	-5.68 [-9.49, -1.88]	-5.68 [-9.49, -1.88]	0.003	0	0.66
Tegner score	[8, 23–25]	-1.09 [-1.54, -0.63]	-1.02 [-1.19, -0.85]	<0.00001	28%	0.25

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