Table 2.

Mortality Rate Ratios (MRRs) and Incidence Rate Ratios (IRRs) for Cancer and Dementia Diagnoses in Patients with HSV-1 and HSV-2 in Cerebrospinal Fluid Compared with Members of the Matched Comparison Cohorts

	HSV-1 Patients versus Comparison Cohort Members		HSV-2 Patients versus Comparison Cohort Members
Mortality	MRR	95% CI	MRR	95% CI
Mortality in first year of follow-up	10.9	7.3, 16.4	8.4	4.4, 16.0
Mortality from the second year and onwards	1.3	0.8, 1.9	0.8	0.3, 2.2
Morbidity	IRR	95% CI	IRR	95% CI
Cancer	0.9	0.5, 1.7	0.9	0.4, 2.0

Abbreviations: HSV-1, herpes simplex virus type 1; HSV-2, herpes simplex virus type 2; CI, confidence interval.