Efficacy and Safety of Ultrasound-Guided Radiofrequency Treatment for Chronic Pain in Patients with Knee Osteoarthritis: A Systematic Review and Meta-Analysis

Table 1

Included studies.

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.