Table 5.

Multivariable Logistic Regression Model of Persistent Joint Pain.

Baseline Factor	Adjusted OR	95% Wald Confidence Limits		p-value
College graduate	5.53	1.13	27.17	0.0353
Headache	2.17	1.16	4.07	0.0157
Knee pain	4.69	1.91	11.51	0.0007
Missed work	5.23	2.87	9.52	<0.0001
Normal activities affected	8.80	3.89	19.89	<0.0001
4 or more days of initial symptoms	2.69	1.57	4.60	0.0003
4 or more weeks of initial joint pain	2.39	1.40	4.08	0.0014

C=0.84

Backward selection was used, dropping predictors that had p> 0.20. SAS (version 9.3, Cary, NC) was used for data analysis with p< 0.05 considered significant except for values where Bonferroni correction was applied in Table 2 (p <0.002) and Table 3 (p<0.0017) were considered significant.