Table I.
Patients’ baseline demographic and clinical characteristics
| Characteristics | LD/2,000 (n = 19) | LD/4,000 (n = 19) | HD/2,000 (n = 19) | HD/4,000 (n = 18) | Control (n = 14) |
|---|---|---|---|---|---|
| Age, years, mean (SD) | 60.84 (8.36) | 62.70 (7.50) | 58.21 (9.47) | 63.65 (6.94) | 61.50 (5.43) |
| Female, n (%) | 11 (57.89) | 12 (63.16) | 10 (52.63) | 12 (66.67) | 8 (57.14) |
| BMI, kg/m², mean (SD) | 24.83 (1.73) | 24.35 (1.36) | 23.91 (1.56) | 25.96 (2.11) | 24.98 (1.32) |
| Duration of KOA, months, mean (SD) | 17.15 (5.36) | 19.92 (6.85) | 18.56 (7.48) | 16.67 (4.72) | 15.73 (8.37) |
| VAS-pain score, mean (SD) | 5.17 (1.17) | 5.33 (1.51) | 5.60 (1.14) | 5.80 (1.79) | 5.26 (1.66) |
| WOMAC score, mean (SD) | 31.17 (14.77) | 29.00 (14.59) | 26.80 (12.13) | 35.40 (24.50) | 26.25 (12.91) |
HD: higher density; LD: lower density; 4,000: 4,000 impulses; 2,000: 2,000 impulses; SD: standard deviation; BMI: body mass index; VAS: visual analogue scale; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.