Table 1.

Comparison between cases and controls regarding age and gender

		Control, no. = 85	Cases, no. = 85	Test value	P value	Sig.
Age (years)	Mean ± SD	55.89 ± 10.13	55.27 ± 10.304	0.398•	0.691	NS
	Range	34–79	31–80
Sex	Females	24 (28.2%)	29 (34.1%)	0.685*	0.408	NS
	Males	61 (71.8%)	56 (65.9%)

P > 0.05: non-significant; P < 0.05: significant; P < 0.01: highly significant

•Independent t test

*Chi-square test