Data that will be extracted from every study included in the review
| No. | Description |
| 1 | Authors and year of publication |
| 2 | Country of study |
| 3 | Type of study |
| 4 | Study population |
| 5 | Study completion rate |
| 6 | Diagnosis |
| 7 | Surgical approach: lateral/transgluteal (Hardinge/Bauer)26/anterolateral (Watson Jones) with or without trochanteric osteotomy26/anterior (Smith Petersen)26/posterior (Moore/ the southern exposure)26/minimally invasive anterolateral (Röttinger)17/anterior minimally invasive26/minimally invasive posterior (mini-posterior)27/2 incision (minimal invasive 2 incision)28/posterolateral29 |
| 8 8a–f | Study population demographics Age, sex, height, body mass, body mass index, comorbidity index |
| 9 9a 9b 9c | Measurement methods Isometric/isokinetic strength measurement Angle of isometric measurement/speed of isokinetic measurement Patient position during the measurement (lying supine, lying lateral recumbent/standing) |
| 10 | Comparators: healthy individuals/asymptomatic contralateral side/no comparator |
| 11 | Total durations of follow-up (weeks after the operation) |
| 12 | Measurement stages (preoperative, follow-up in weeks after the operation) |
| 13 | Information regarding the rehabilitation protocols |
| 14 14a 14b 14c 14d | Outcome (mean values, SDs and CIs) Absolute values of hip abductor torque in patients after THA, or in asymptomatic control groups Torque ratio (operated/contralateral hip) of hip abductors in patients after THA Change in hip abductor torque/hip abductor torque ratio from baseline to the last available follow-up Differences in hip abductor torque/torque ratios between patients after THA and healthy control groups. |
| 15 | Authors conclusions |
| 16 | Information regarding risk of bias |
THA, total hip arthroplasty.