Table 3.

Multivariable Correlates of Physical Therapy Utilization for the Management of Symptomatic Knee Osteoarthritis (OA) (n = 277).^a

Correlate	Odds Ratio	95% CI
Interaction of race by history of injection	4.1	3.26–13.37
Women	3.06	1.58–5.93
Bachelor degree or postgraduate work	2.44	1.15–5.16
Having family members with knee OA	1.64	0.95–2.83
History of knee injury	1.86	1.08–3.19
Employed	0.58	0.34–1.00
Duration of knee OA symptoms
>5–10 y	2.16	1.09–4.29
>10 y	2.11	1.10–4.04
Reference category: <1–5 y

^aStatistically significant values are in bold type. An odds ratio was considered significant if the 95% CI did not include 1.00. The model was adjusted for age and body mass index.

^bReference category: the odds ratio for the categories of variables are calculated in reference to the reference category of the variable.