Table 2.

The standardized incidence ratio of total cancer risk in patients with alopecia area, stratified by gender and age

AA patients	Cancer	Expected	SIR	95% CI
Total	2099	2197.29	0.96	0.91–1.00
<50	1183	1288.39	0.92	0.88–0.96
≥50	916	908.90	1.01	0.96–1.05
Male	947	1066.25	0.89	0.85–0.93
<50	513	602.36	0.85	0.82–0.89
≥50	434	463.89	0.94	0.90–0.98
Female	1152	1131.04	1.02	0.97–1.06
<50	670	686.03	0.98	0.93–1.02
≥50	482	445.02	1.08	1.04–1.13