|
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)
|
