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Table 2 Results from each Performed Analysis (SMD)

From: Intra-articular platelet-rich plasma injections versus intra-articular corticosteroid injections for symptomatic management of knee osteoarthritis: systematic review and meta-analysis

Pain Score Reduction (WOMAC/VAS)
Outcome Number of studies Pooled SMD (95 CI) P Heterogeneity
I2 (%) P
1 month 4 −0.07 [−0.49, 0.35] 0.74 65 0.03
3 month 6 −0.51 [− 0.90, − 0.12] 0.01 72 0.003
6 month 7 −0.78 [− 1.34, − 0.23] 0.005 88 < 0.00001
9 months 1 − 1.63 [− 2.14, − 1.12] < 0.00001 n/a n/a
12 months 2 −1.12 [− 3.34, 1.09] 0.32 97 < 0.00001
LP-PRP 3 −0.61 [− 0.92, − 0.29] 0.00002 16 0.31
LR-PRP 5 −0.98 [−1.79, − 0.17] 0.02 92 < 0.00001
Single PRP injection 5 −0.52 [−1.11, 0.07] 0.08 87 < 0.00001
Triple PRP Injection 2a −0.94 [−1.31, − 0.58] < 0.00001 12 0.29
  1. aUslu et al. [20] excluded from the analysis for significant statistical heterogeneity