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Table 5 Meta-analysis results of RCTs

From: Quadriceps-sparing versus traditional medial parapatellar approaches for total knee arthroplasty: a meta-analysis

Outcomes of Demographics Number of Contributing Studies Number of QS TKAs Number of MP TKAs WMD or OR (95% CI) P - Value Heterogeneity
KS Knee Score beyond 24 months 2 155 155 −0.18 (−1.13, 0.77) 0.71 25%
KS Function Score beyond 24 months 2 155 155 1.86 (0.86, 2.85) 0.0002 0%
ROM beyond 16 months 3 193 192 −0.41 (−2.18, 1.37) 0.65 0%
Complications 5 243 244 1.49 (0.68, 3.27) 0.32 1%
Infections 7 301 300 1.95 (0.75, 5.10) 0.17 0%
Mechanical axis outliers 2 55 54 3.80 (0.61, 23.57) 0.15 25%
Femoral component coronal angle outliers 3 93 91 5.24 (0.80, 34.28) 0.08 20%
Tibial component coronal angle outliers 3 93 91 4.14 (0.87, 19.75) 0.07 0%
Mechanical axis 3 88 89 0.34 (−0.37, 1.05) 0.35 15%
Femoral component coronal angle 5 251 251 0.07 (−1.30, 1.44) 0.92 93%
Tibial component coronal angle 5 251 251 −0.31 (− 1.58, 0.97) 0.64 93%
Lateral patellar tilt 2 143 144 0.73 (−0.30, 1.76) 0.16 0%
KS Knee Score 1.5–3 months 3 178 179 1.01 (−0.74, 2.76) 0.26 61%
KS Function Score 1.5–3 months 3 178 179 −0.67 (−5.45, 4.10) 0.78 82%
ROM 1–2 weeks 2 58 56 4.87 (1.78, 7.96) 0.002 0%
ROM 4–8 weeks 3 93 91 1.68 (−2.16, 5.51) 0.39 60%
VAS 1 day 3 93 91 −0.07 (−0.49, 0.35) 0.74 0%
VAS 4–8 weeks 2 58 56 −0.46 (−2.31, 1.40) 0.63 87%
Surgical time (min) 5 243 241 18.86 (8.81, 28.91) 0.0002 94%
Tourniquet time (min) 3 193 192 24.39 (3.19, 45.60) 0.02 99%
Intraoperative blood loss (ml) 2 158 157 3.10 (−24.89, 31.09) 0.83 0%
Total blood loss (ml) 4 111 110 4.24 (−56.29, 64.77) 0.89 48%
Incision, extension (cm) 4 188 188 −3.76 (−6.79, −0.73) 0.02 99%
Incision, flexion (cm) 3 193 192 −1.90 (−3.99, 0.19) 0.07 99%
Length of stay (days) 4 205 204 −0.34 (−1.02, 0.34) 0.33 71%
SLR at 24 h (% of patients) 2 73 72 1.62 (0.79, 3.30) 0.19 0%
  1. TKA total knee arthroplasty, QS quadriceps-sparing, MP medial parapatellar, WMD weighted mean difference, OR odds ratio, CI confidence interval, KS knee society, ROM range of motion, VAS visual analogue scale, SLR straight leg rising