Pain Research and Management / 2020 / Article / Tab 1 / Review Article
Efficacy and Safety of Ultrasound-Guided Radiofrequency Treatment for Chronic Pain in Patients with Knee Osteoarthritis: A Systematic Review and Meta-Analysis Study Country Type of study Sample size Gender (M/F) Age mean (SD) (intervention/control) K-L grade Follow-up time (week) Sari et al. [23 ] Turkey RCT 50 6/44 66.08 (10.52)/65.92 (8.71) 2-4 4, 12 Xie et al. [24 ] China RCT 54 23/31 60 (6)/59 (6) 2-3 4, 24 Monerris et al. [25 ] Spain RCT 25 7/18 75.2 (9.1) 3-4 4, 12, 24 Djibilian Fucci et al. [26 ] Spain Prospective study 47 6/41 70.6 (9.7) — 4 Ibrahim Aly et al. [27 ] Egypt Prospective study 30 6/24 60.8 (7.1) 2-3 1, 4, 12 Santana Pineda et al. [28 ] Spain Prospective study 25 3/22 72.5 (9) 3-4 4, 24, 48 Erdem and Sir [29 ] Turkey Retrospective study 17 5/12 69.75 (11.82) 3-4 3, 12 Ahmed and Arora [30 ] India Retrospective study 8 5/3 65.75 (6.96) 3-4 4, 24
K-L grade: Kellgren–Lawrence grading system; RCT: randomized controlled trial.