Table 2. Characteristic of the Included RCTs.
| Study | Country | Level of evidence | Surgical team | Surgical approach | Analgesia in the control group | Sample size (n) (intervention /control) | Mean age (yr) (intervention /control) | Female (n) (intervention /control) | BMI (kg/m2) (intervention /control) |
|---|---|---|---|---|---|---|---|---|---|
| Aliste et al.18) (2021) | Chile | I | Single | Posterior | FIB | 20/20 | 56.8/59.6 | 7/7 | 27.6/28.4 |
| Pascarella et al.19) (2021) | Italy | I | Single | Posterior | LI | 30/30 | 66.4/66.7 | 14/13 | 29.2/28.0 |
| Zheng et al.23) (2022) | Korea | I | Single | Posterior | LI | 25/27 | 60.0/63.0 | 10/11 | Not mentioned |
| Zheng et al.24) (2022) | China | I | Single | Posterior | LI | 34/36 | 63/64 | 22/21 | 23.3/23.6 |
| Hua et al.25) (2022) | China | I | Not mentioned | Not mentioned | FIB | 24/24 | 74/74 | 10/11 | 24.0/23.0 |
RCT: randomized controlled trial, LI: local infiltration, FIB: fascia iliaca block, BMI: body mass index.