Factors Affecting Physical Activity of People with Knee Osteoarthritis in Southern Taiwan: A Multiple Logistic Regression Analysis

Table 3

Results of multiple logistic regressions analyses of active physical activities among people with KOA (n = 188).

Variables	B	S,E.	Wald value	OR	(95% CI)	value
Age^† (year)	−0.093	0.031	9.248	0.91	(0.86–0.97)	0.002
Marital status
Without spouse (n = 78)				1
With spouse (n = 110)	0.129	0.410	0.098	1.14	(0.51–2.54)	0.754
Comorbidities
CCI <1 (n = 117)				1.00
CCI ≥1 (n = 71)	−1.006	0.441	5.202	0.37	(0.15–0.87)	0.023
Self-reported history of OA
<5 years (n = 91)				1
5 to 10 years (n = 56)	−0.455	0.451	1.017	0.64	(0.26–1.54)	0.313
≥10 years (n = 41)	−0.542	0.556	0.952	0.58	(0.20–1.73)	0.329
Site of pain knee
Unilateral (n = 91)				1.00
Bilateral (n = 97)	−0.594	0.390	2.317	0.55	(0.26–1.19)	0.128
WOMAC index score^†	−0.013	0.017	0.548	0.99	(0.95–1.02)	0.459
6 m preferred walking speed (m/sec)^†	1.958	0.933	4.399	7.08	(1.14–44.13)	0.036
Constant	4.636	2.814	2.714	103.13		0.099

;^† indicates continuous variable. CCI, Charlson Comorbidity Index; goodness of fit: χ2 = 44.24,; Hosmer–Lemeshow χ² = 9.39 df = 8, . Strength of association: Cox and Snell R² = 0.21; Nagelkerke R² = 0.30.