Table 2.

Demographic characteristics of patients in viral and nonviral group.

	All patients	Viral	Nonviral	p
Number of patients	61	25	36	0.159∗
Age (years)	44	50.6	35.7	0.014∗∗
M/F	35/29	13/12	19/17	1∗∗∗
Follow-up (months)	67.8	65.9	69.1	0.74

^∗Chi-squared, ^∗∗ t-test for equal variance, ^∗∗∗Fisher exact test.