Table 3. Incidence and hazard ratio of non-melanoma skin cancer in statin users and non-users stratified by subgroup.

		Statin users				Statin never users				Hazard ratio
Variables		Patients	Cases	Time at risk (PY)	Incidence (per 1,000 PY)	Patients	Cases	Time at risk (PY)	Incidence (per 1,000 PY)	(95% confident interval)	p-value
All		18,579	76	111,417	0.68	18,579	73	110,568	0.66	1.03 (0.75–1.43)	0.841
	<365	9,302	27	49,016	0.55	9,302	25	48,165	0.52	1.07 (0.62–1.84)	0.811
	≥365	9,286	38	62,009	0.61	9,286	52	62,285	0.84	0.74 (0.48–1.12)	0.151
Age (yr)
	40–64	12,560	32	80,773	0.40	12,560	32	79,370	0.42	0.95 (0.59–1.55)	0.839
	≥65	6,143	40	31,117	1.29	6,143	41	31,888	1.29	1.02 (0.66–1.57)	0.938
Sex
	Male	8,800	25	51,776	0.48	8,800	26	51,130	0.51	0.95 (0.55–1.64)	0.854
	Female	9,913	45	60,804	0.74	9,913	52	60,211	0.86	0.86 (0.57–1.27)	0.441

PY: person-year.