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Table 1 Baseline characteristics of patients

From: Effects of acupuncture at acupoints with lower versus higher pain threshold for knee osteoarthritis: a multicenter randomized controlled trial

Characteristic LPT group (n = 222) HPT group (n = 222) WL group (n = 222) All (n = 666)
Age, mean (SD), y 60.46 (9.10) 61.35 (8.73) 60.41 (8.56) 60.74 (8.80)
Sex (female), n (%) 174 (78.38) 176 (79.28) 185 (83.33) 535 (80.33)
BMI, mean (SD) 24.18 (3.19) 23.91 (2.89) 24.06 (2.94) 24.05 (3.00)
Duration of disease, mean (SD), y 6.19 (6.73) 6.54 (8.44) 5.14 (5.14) 5.96 (6.95)
Kellgren-Lawrence criteria, n (%)
 Grade 0 62 (28.44) 62 (28.18) 60 (27.27) 184 (27.96)
 Grade I 77 (35.32) 82 (37.27) 81(36.82) 240 (36.47)
 Grade II 60 (27.52) 59 (26.82) 61 (27.73) 180 (27.36)
 Grade III 19 (8.72) 17 (7.73) 18 (8.18) 54 (8.21)
Type of KOA, n (%)
 Unilateral 38 (17.12) 42 (18.92) 51 (22.97) 131 (19.7)
 Bilateral 184 (82.88) 180 (81.08) 171 (77.03) 535 (80.3)
 Previous use of acupuncture for KOA, n (%) 21 (9.46) 14 (6.31) 18 (8.11) 53 (7.96)
WOMAC index, mean (SD)
 WOMAC total 51.84 (39.99) 55.69 (41.42) 52.4 (36.88) 53.3 (39.44)
 WOMAC pain 11.57 (8.2) 12.4 (9.36) 11.35 (7.91) 11.77 (8.51)
 WOMAC stiffness 4 (4.35) 3.8 (4.19) 4.02 (4.26) 3.94 (4.26)
 WOMAC function 36.26 (30.01) 39.49 (31.02) 37.03 (27.15) 37.59 (29.42)
SF-12 Index, mean (SD)
 Physical health 39.22 (8.15) 38.25 (8.53) 38.64 (7.88) 38.7 (8.18)
 Mental health 52.57 (10.17) 53.01 (9.59) 52.31 (10.17) 52.63 (9.97)
Active range of motion, mean (SD)
 Flexion 121.47 (14.97) 122 (12.69) 121.13 (12.59) 121.53 (13.45)
 Extension 0.16 (0.67) 0.14 (0.82) 0.33 (1.18) 0.21 (0.92)
 Internal rotation 26.03 (6.88) 27.38 (7.18) 26.97 (7.21) 26.79 (7.10)"
 External rotation 27.71 (14.77) 27.67 (7.18) 27.56 (6.74) 27.65 (10.25)
Pressure pain threshold, mean (SD) 64.81 (41.03) 114.31 (18.00)
Acupuncture treatment received ≥ 8 sessions, n (%) 204 (91.89) 202 (90.99)
Acupuncture treatment received 12 sessions, n (%) 184 (82.88) 187 (84.23)
  1. LPT lower pain threshold, HPT higher pain threshold, WL waiting-list