Table 3.

30-day outcomes of hospital admission with urgent CT scan of the head and all-cause mortality

	Number of events (Percent)		Relative risk	P-value
	Higher dose a (n = 23,256)	Lower dose b (Referent) (n = 3,876)	[95% confidence interval]
Hospital admission with urgent CT scan of the head	247 (1.06%)	43 (1.11%)	0.96 [0.69 to 1.33]	0.79
All-cause mortality	63 (0.27%)	15 (0.39%)	0.70 [0.40 to 1.23]	0.21

Abbreviations: CT, Computed Tomography.

^aHigher dose of antiviral defined as 4,000 mg/day for acyclovir, 3,000 mg/day for valacyclovir, and 1,500 mg/day for famciclovir.

^bA lower dose of antiviral defined as 3,200 mg/day, 2,400 mg/day, 1,600 mg/day or 800 mg/day for acyclovir, 2,000 mg/day, 1,500 mg/day, 1,000 mg/day, or 500 mg/day for valacyclovir, and 1,000 mg/day, 500 mg/day, or 350 mg/day for famciclovir.