Table 3. Open in new tab Multivariable...

Community-Associated CDI Multivariable Model^a

Age	1–17	1.00 (reference)
18–44	1.72	1.38–2.14	<.0001
45–64	3.42	2.77–4.24	<.0001
≥65	7.17	5.76–8.94	<.0001
Sex	Male	1.00 (reference)
Female	1.41	1.23–1.61	<.0001
Race	Non-white	1.00 (reference)
White	1.45	1.21–1.75	<.0001
Test	NAAT use by 10% increase	1.11	1.06–1.16	<.0001
Healthcare-Associated CDI Multivariable Model^c
Predictor	Category	Incidence Rate Ratio^d	95% CI	P
Age	1–17	1.00 (reference)
18–44	2.67	2.01–3.54	<.0001
45–64	11.23	8.54–14.76	<.0001
≥65	68.79	52.56–90.03	<.0001
Inpatient-days	Increase in 10 000 inpatient-days per hospital	1.10	1.01–1.20	.02
Test	NAAT use by 10% increase	1.06	.99–1.14	.13

Community-Associated CDI Multivariable Model^a

Age	1–17	1.00 (reference)
18–44	1.72	1.38–2.14	<.0001
45–64	3.42	2.77–4.24	<.0001
≥65	7.17	5.76–8.94	<.0001
Sex	Male	1.00 (reference)
Female	1.41	1.23–1.61	<.0001
Race	Non-white	1.00 (reference)
White	1.45	1.21–1.75	<.0001
Test	NAAT use by 10% increase	1.11	1.06–1.16	<.0001
Healthcare-Associated CDI Multivariable Model^c
Predictor	Category	Incidence Rate Ratio^d	95% CI	P
Age	1–17	1.00 (reference)
18–44	2.67	2.01–3.54	<.0001
45–64	11.23	8.54–14.76	<.0001
≥65	68.79	52.56–90.03	<.0001
Inpatient-days	Increase in 10 000 inpatient-days per hospital	1.10	1.01–1.20	.02
Test	NAAT use by 10% increase	1.06	.99–1.14	.13

Table 3.

Multivariable Modeling Analysis for Predictors of High Community- and Healthcare-Associated Clostridium difficile Infection (CDI) Incidence, 2010

Community-Associated CDI Multivariable Model^a
Predictor	Category	Incidence Rate Ratio^b	95% CI	P

Age	1–17	1.00 (reference)
	18–44	1.72	1.38–2.14	<.0001
	45–64	3.42	2.77–4.24	<.0001
	≥65	7.17	5.76–8.94	<.0001
Sex	Male	1.00 (reference)
Sex	Female	1.41	1.23–1.61	<.0001
Race	Non-white	1.00 (reference)
Race	White	1.45	1.21–1.75	<.0001
Test	NAAT use by 10% increase	1.11	1.06–1.16	<.0001
Healthcare-Associated CDI Multivariable Model^c
Predictor	Category	Incidence Rate Ratio^d	95% CI	P
Age	1–17	1.00 (reference)
	18–44	2.67	2.01–3.54	<.0001
	45–64	11.23	8.54–14.76	<.0001
	≥65	68.79	52.56–90.03	<.0001
Inpatient-days	Increase in 10 000 inpatient-days per hospital	1.10	1.01–1.20	.02
Test	NAAT use by 10% increase	1.06	.99–1.14	.13

Community-Associated CDI Multivariable Model^a
Predictor	Category	Incidence Rate Ratio^b	95% CI	P

Age	1–17	1.00 (reference)
	18–44	1.72	1.38–2.14	<.0001
	45–64	3.42	2.77–4.24	<.0001
	≥65	7.17	5.76–8.94	<.0001
Sex	Male	1.00 (reference)
Sex	Female	1.41	1.23–1.61	<.0001
Race	Non-white	1.00 (reference)
Race	White	1.45	1.21–1.75	<.0001
Test	NAAT use by 10% increase	1.11	1.06–1.16	<.0001
Healthcare-Associated CDI Multivariable Model^c
Predictor	Category	Incidence Rate Ratio^d	95% CI	P
Age	1–17	1.00 (reference)
	18–44	2.67	2.01–3.54	<.0001
	45–64	11.23	8.54–14.76	<.0001
	≥65	68.79	52.56–90.03	<.0001
Inpatient-days	Increase in 10 000 inpatient-days per hospital	1.10	1.01–1.20	.02
Test	NAAT use by 10% increase	1.06	.99–1.14	.13

Abbreviations: CI, confidence interval; NAAT, nucleic acid amplification test.

^a Candidate variables included in the model: age, sex, race, NAAT usage, percentage of urban population, percentage of 18–64 years without health insurance, and average number of outpatient visits per hospital in each surveillance site.

^b Adjusted for the factors that remained in the final model (age, sex, race, test).

^c Candidate variables included in the model: age, sex, race, NAAT usage, average number of inpatient-days per hospital, and average number of nursing home patients in each surveillance site.

^d Adjusted for the factors that remained in the final model (age, inpatient-days, test).

This Feature Is Available To Subscribers Only