Is Lifelong Knee Joint Force from Work, Home, and Sport Related to Knee Osteoarthritis?
Table 2
Crude and adjusted† odds ratios for knee OA*, by sex.
Males ()
Females ()
Prevalence (%)
Unadjusted OR (95% CI)
Adjusted OR† (95% CI)
Prevalence (%)
Unadjusted OR (95% CI)
Adjusted OR† (95% CI)
Knee OA*
17.8
25.1
Age
<57
24.5
1.00
1.00
38.6
1.00
1.00
58–64
34.6
1.16 (0.82, 1.65)
1.23 (0.85, 1.79)
32.6
1.19 (0.97, 1.47)
1.25 (1.00, 1.57)
65+
40.9
1.50 (1.08, 2.09)
1.92 (1.34, 2.74)
28.0
1.40 (1.14, 1.73)
1.55 (1.23, 1.95)
Knee injury
No
76.1
1.00
1.00
81.7
1.00
1.00
Yes
23.9
4.10 (3.16, 5.35)
4.24 (3.20, 5.62)
18.3
3.12 (2.77, 4.15)
3.17 (2.54, 3.94)
BMI+
Normal
22.0
1.00
1.00
28.9
1.00
1.00
Underweight
0.8
1.21 (0.26, 5.70)
1.99 (0.40, 9.75)
1.6
1.37 (0.64, 2.93)
0.84 (0.33, 2.11)
Overweight
47.7
1.28 (0.91, 1.85)
1.09 (0.75, 1.60)
36.1
1.68 (1.32, 2.12)
1.69 (1.31, 2.19)
Obese
29.5
2.44 (1.70, 3.50)
2.20 (1.48, 3.26)
33.4
3.35 (2.65, 4.23)
3.17 (2.54, 3.94)
Total knee (TF) force
CPFI 1
16.8
1.00
1.00
21.9
1.00
1.00
CPFI 2
21.4
1.00 (0.64, 1.56)
0.88 (0.55, 1.41)∧
19.2
1.15 (0.84, 1.54)
1.10 (0.81, 1.50)∧
CPFI 3
23.7
1.09 (0.70, 1.67)
0.95 (0.60, 1.50)∧
17.8
1.37 (1.02, 1.83)
1.27 (0.94, 1.73)∧
CPFI 4
22.0
1.49 (0.98, 2.28)
1.19 (0.72, 1.77)∧
18.8
1.42 (1.07, 1.89)
1.28 (0.95, 1.73)∧
CPFI 5
16.2
2.22 (1.44, 3.42)
1.70 (1.06, 2.70)∧
22.3
2.01 (1.53, 2.62)
1.52 (1.15, 2.02)∧
*Self-reported medical diagnosis of knee OA, plus pain, aching, or stiffness most days.
†Adjusted for all other covariates in table.
+BMI categories: normal (20–24.9), underweight (<20), overweight (25–29.9), and obese (>30.0). ∧Test for trend: .
