Table 1 Baseline characteristics of study participants
Characteristics | Aggregated (n = 20) | Active phototherapy (n = 10) | Placebo control (n = 10) |
|---|---|---|---|
Age–years (mean, SD) | 63.95 (9.27) | 60.60 (10.35) | 67.30 (7.01) |
Sex | |||
Male (n, %) | 7(35) | 3(30) | 4(40) |
Female (n, %) | 13 (65) | 7 (70) | 6 (60) |
Gender | |||
Man (n, %) | 7 (35) | 3 (30) | 4 (40) |
Woman (n, %) | 13 (65) | 7 (70) | 6 (60) |
Annual household income (n, %) | |||
< $20,000 | 0 (0) | 0 (0) | 0 (0) |
$20,000 to $40,000 | 7 (35) | 4 (40) | 3 (30) |
$40,000 to $60,000 | 3 15) | 1 (10) | 2 (20) |
$60,000 to $80,000 | 2 (10) | 1 (10) | 1 (10) |
$80,000 to $100,000 | 2 (10) | 2 (20) | 0 (0) |
> $100,000 | 6 (30) | 2 (20) | 4 40) |
Affected knee (n, %) | |||
Left | 16 (80) | 8 (80) | 8 (80) |
Right | 4 (20) | 2 (20) | 2 (20) |
Knee pain duration–years (mean, SD) | 7.38(9.25) | 7.15 (10.21) | 7.60 (8.74) |
Number of other body regions with pain (mean, SD) | 4.00 (2.68) | 3.90 2.64) | 4.10 (2.85) |
NSAID usage in the past 3 months | |||
Yes (n, %) | 7 (44) | 3 (42.90) | 4 (44.44) |
No (n, %) | 9 (56) | 4 (57.10) | 5 (55.56) |
Pain killer usage in the past three months | |||
Yes (n, %) | 10 (63) | 3 (42.90) | 7 (77.78) |
No (n, %) | 6 (37) | 4 (57.10) | 2 (22.22) |
Number of comorbidities (median, IQR) | 0.80 (1) | 0.70 (1) | 0.90 (1) |
Comorbidities (n,%) | |||
Heart attack | 1 (5) | 0 (0) | 1 (10) |
Asthma | 3 15) | 0 (0) | 3 (30) |
Chronic obstructive pulmonary disease | 1(5) | 0 (0) | 1 (10) |
Diabetes | 7 35) | 3 (30) | 4 (40) |
Kidney problems secondary to diabetes | 1 (5) | 1 (10) | 0 (0) |
Eye problems secondary to diabetes | 1 (5) | 1 (10) | 0 (0) |
Poor kidney function | 1 (5) | 1 (10) | 0 (0) |
Rheumatoid arthritis | 2 (10) | 1 (10) | 1 (10) |