Table 3.

GEE Model for arrival vs. failure to attend

OR of patient characteristics predicting arrival at the pain clinic in our two marginal logistic regression models, (on the left using language or on the right race/ethnicity as demographic marker) are presented with confidence intervals and p-values. Time-dependent interaction terms were found between particular complaint and office visit number and procedure performed and office visit number.

Language Model (N=1298)				Race Model (N=1297)
Variable	Odds Ratio	95% CI	p-value	Variable	Odds Ratio	95% CI	p-value
English language (reference)	1.00	N/A	N/A	Caucasian Race (reference)	1.00	N/A	N/A
Spanish language	0.74	0.61–0.91	0.004	Black Race	0.83	0.65–1.06	0.13
Other language	1.02	0.66–1.58	0.91	Hispanic Race	0.61	0.47–0.79	<0.001
				Other Race	0.60	0.45–0.79	<0.001
Age	1.00	1.00–1.01	0.16	Age	1.00	1.00–1.01	0.15
Female	0.91	0.78–1.06	0.21	Female	0.92	0.79–1.08	0.31
Unemployed	1.50	1.12–1.99	0.006	Unemployed	1.52	1.13–2.04	0.005
Disability	0.96	0.64–1.45	0.85	Disability	0.98	0.65–1.49	0.92
Five-ten miles from clinic	0.76	0.61–0.93	0.008	Five-ten miles from clinic	0.79	0.63–0.97	0.027
Ten-twenty miles from clinic	1.04	0.85–1.27	0.73	Ten-twenty miles from clinic	1.05	0.85–1.30	0.63
Twenty-thirty miles from clinic	1.01	0.76–1.36	0.93	Twenty-thirty miles from clinic	1.01	0.75–1.36	0.93
Thirty plus miles from clinic	0.88	0.68–1.13	0.31	Thirty plus miles from clinic	0.85	0.65–1.12	0.25
Office visit wave	1.12	1.05–2.73	0.001	Office visit wave	1.12	1.05–1.18	<0.001
Particular complaint	3.30	2.50–4.34	<0.001	Particular complaint	3.46	2.64–4.53	<0.001
Particular complaint-office visit wave interaction term	0.90	0.84–0.96	0.003	Particular complaint-office visit wave interaction term	0.90	0.85–0.96	0.001
Procedure performed	2.16	1.71–2.73	<0.001	Procedure performed	2.18	1.72–2.76	<0.001
Procedure performed-office visit wave interaction term	0.87	0.82–0.92	<0.001	Procedure performed-office visit wave interaction term	0.87	0.82–0.92	<0.001