Table 3.
Results of random-effects pooling for studies that reported estimates of responsiveness by different study characteristics
| Number of Estimates | I-squared (95% CI) | SRM (95% CI) | |
|---|---|---|---|
| Overall | 43 | 0.82 (0.76, 0.86) | 0.33 (0.26, 0.41) |
| Knee Flexion | |||
| Extended | 16 | 0.19 (0.00, 0.55) | 0.32 (0.26, 0.37) |
| Flexed | 27 | 0.88 (0.84, 0.91) | 0.34 (0.22, 0.45) |
| Fluoroscopy | |||
| Fluoro | 23 | 0.83 (0.76,0.88) | 0.38 (0.27, 0.48) |
| No Fluoro | 20 | 0.79 (0.69 0.86) | 0.28 (0.17, 0.39) |
| Measurement Method | |||
| Manual | 18 | 0.80 (0.70, 0.87) | 0.38 (0.26, 0.50) |
| Computerized | 24 | 0.84 (0.77, 0.89) | 0.31 (0.20, 0.41) |
| Study Type | |||
| RCT | 19 | 0.82 (0.73, 0.88) | 0.30 (0.20, 0.40) |
| Cohort | 24 | 0.82 (0.74, 0.87) | 0.36 (0.24, 0.49) |
| Follow-up Time | |||
| 1-year or less | 21 | 0.56 (0.27, 0.73) | 0.24 (0.15, 0.32) |
| 1–2 years | 10 | 0.80 (0.63, 0.89) | 0.25 (0.13, 0.37) |
| Greater than 2 years | 12 | 0.88 (0.81, 0.93) | 0.57 (0.39, 0.75) |
| Reader blinded to order of radiographs | |||
| Yes | 19 | 0.76 (0.63, 0.85) | 0.30 (0.19, 0.40) |
| No | 2 | 0.59 (0.00, 0.90) | 0.55 (0.33, 0.76) |
| Unknown | 22 | 0.85 (0.78, 0.89) | 0.35 (0.23, 0.46) |
| Knee Flexion by Follow-up Time | |||
| Extended/1-year or less | 9 | 0.00 (0.00, 0.63) | 0.26 (0.19, 0.34) |
| Extended/1–2 years | 2 | 0.61 (0.00, 0.91) | 0.38 (0.10, 0.65) |
| Extended/Greater than 2 years | 5 | 0.32 (0.00, 0.74) | 0.34 (0.24, 0.44) |
| Flexed/1-year or less | 12 | 0.68 (0.42, 0.83) | 0.19 (0.06, 0.32) |
| Flexed/1–2 years | 8 | 0.82 (0.65, 0.90) | 0.22 (0.08, 0.36) |
| Flexed/Greater than 2 years | 7 | 0.88 (0.78, 0.94) | 0.71 (0.44, 0.98) |
| Fluoroscopy by Follow-up Time | |||
| Fluoro/1-year or less | 9 | 0.33 (0.00, 0.69) | 0.29 (0.18, 0.39) |
| Fluoro/1–2 years | 7 | 0.81 (0.62, 0.91) | 0.29 (0.14, 0.44) |
| Fluoro/Greater than 2 years | 7 | 0.87 (0.75, 0.93) | 0.58 (0.36, 0.80) |
| No Fluoro/1-year or less | 12 | 0.61 (0.28, 0.79) | 0.21 (0.10, 0.32) |
| No Fluoro/1–2 years | 3 | 0.82 (0.45, 0.94) | 0.15 (−0.13, 0.42) |
| No Fluoro/Greater than 2 years | 5 | 0.89 (0.78, 0.95) | 0.56 (0.24, 0.87) |
| Measurement Method by Follow-up Time | |||
| Manual/1-year or less | 8 | 0.20 (0.00, 0.63) | 0.28 (0.17, 0.38) |
| Manual/1–2 years | 2 | 0.92 (0.73, 0.98) | 0.19 (−0.44, 0.82) |
| Manual/Greater than 2 years | 8 | 0.87 (0.77, 0.93) | 0.51 (0.31, 0.71) |
| Computerized/1-year or less | 12 | 0.68 (0.42, 0.83) | 0.21 (0.08, 0.33) |
| Computerized/1–2 years | 8 | 0.78 (0.56, 0.89) | 0.26 (0.13, 0.38) |
| Computerized/Greater than 2 years | 4 | 0.90 (0.77, 0.96) | 0.68 (0.31, 1.06) |
| Study Type by Follow-up Time | |||
| RCT/1-year or less | 10 | 0.60 (0.19, 0.80) | 0.21 (0.11, 0.32) |
| RCT/1–2 years | 5 | 0.87 (0.72, 0.94) | 0.24 (0.07, 0.41) |
| RCT/Greater than 2 years | 4 | 0.51 (0.00, 0.84) | 0.56 (0.41, 0.70) |
| Cohort/1-year or less | 11 | 0.51 (0.03, 0.75) | 0.26 (0.13, 0.40) |
| Cohort/1–2 years | 5 | 0.69 (0.20, 0.88) | 0.26, (0.06, 0.46) |
| Cohort/Greater than 2 years | 8 | 0.92 (0.86, 0.95) | 0.57 (0.30, 0.85) |