Table 3.

Subgroup Analyses of Crude and Adjusted Odds Ratios (95% Confidence Interval) of Dementia for Herpes Zoster Infection According to Age and Sex.

	Herpes zoster infection
Characteristics	Crude	P	Adjusted†	P
Age < 80 years old (n = 35,865)
Dementia	0.95 (0.87-1.04)	0.258	0.91 (0.83-1.00)	0.060
Control	1.00		1.00
Age ≥ 80 years old (n = 21,360)
Dementia	0.94 (0.83-1.06)	0.277	0.88 (0.78-1.00)	0.057
Control	1.00		1.00
Men (n = 18,330)
Dementia	0.82 (0.71-0.94)	0.005*	0.77 (0.66-0.89)	0.001*
Control	1.00		1.00
Women (n = 38,895)
Dementia	1.00 (0.92-1.09)	0.972	0.96 (0.88-1.05)	0.392
Control	1.00		1.00

*Conditional logistic regression analyses stratified for age, sex, income, region of residence, hypertension, diabetes mellitus, and dyslipidemia. Significance at P < 0.05.

^†Adjusted model for ischemic heart disease, stroke, and depression histories.