Pharmacological use of gamma-aminobutyric acid derivatives in osteoarthritis pain management: a systematic review

BMC Rheumatology

Table 2 Participants characteristics

Study	Nation	Female ratio	Age (years)	Affected joint	Disease duration	Severity of OA
Sofat et al. [15]	United Kingdom	0.80	40–75	Hand	3.5 ± 4.2 (mean ± SD) years	unclear
Ohtori et al. [17]	Japan	0.71	Unclear	Knee	35.5 ± 8.0 (mean ± SEM) months	KL 1: 24.7%; KL 2: 27.0%; KL 3: 34.8%; KL4, 13.5%
Moghaddam et al. [18]	Iran	0.73	45–75	Knee	Unclear	KL 2 to 3 with VAS ≥ 5 or WOMAC score ≥ 48

SD standard deviation, SEM standard error of the mean, OA osteoarthritis, KL Kellgren-Lawrence, VAS Visual analogue scale, WOMAC Western Ontario and McMaster Universities Arthritis Index

ISSN: 2520-1026