Table 2. Incidence and hazard ratio of non-melanoma skin cancer according to statin exposure across 11 databases.
| Variables | Statin users | Statin non-users | Hazard ratio | p-value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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) | ||
| KHNMC | 2,372 | 14 | 14,724 | 0.95 | 2,372 | 11 | 14,514 | 0.76 | 1.00 (0.39–2.56) | 1.00 |
| KHMC | 4,643 | 15 | 25,324 | 0.59 | 4,643 | 14 | 24,983 | 0.56 | 1.12 (0.43–3.00) | 0.81 |
| EUMC | 500 | 3 | 2,641 | 1.14 | 500 | 4 | 2,710 | 1.48 | 1.00 (0.12–8.33) | 1.00 |
| PNUH | 726 | 2 | 2,219 | 0.90 | 726 | 4 | 2,235 | 1.79 | 0.50 (0.02–5.22) | 0.62 |
| AUMC | 1,718 | 4 | 13,110 | 0.31 | 1,718 | 5 | 12,878 | 0.39 | 1.50 (0.25–11.39) | 0.68 |
| KDH | 1,016 | 3 | 8,109 | 0.37 | 1,016 | 3 | 8,172 | 0.37 | 1.50 (0.25–11.39) | 0.68 |
| KWMC | 1,048 | 8 | 6,913 | 1.16 | 1,048 | 7 | 6,752 | 1.04 | 1.00 (0.31–3.20) | 1.00 |
| DCMC | 2,207 | 15 | 13,490 | 1.11 | 2,207 | 11 | 13,734 | 0.80 | 1.38 (0.56–3.55) | 0.50 |
| SCHSU | 1,516 | 6 | 8,446 | 0.71 | 1,516 | 4 | 8,377 | 0.48 | 3.00 (0.38–60.62) | 0.39 |
| SCHBC | 1,923 | 6 | 12,178 | 0.49 | 1,923 | 8 | 11,823 | 0.68 | 1.00 (0.28–3.60) | 1.00 |
| SCHCA | 910 | 0 | 4,262 | 0 | 910 | 2 | 4,389 | 0.46 | 0.14 | |
| Total | 18,579 | 76 | 111,417 | 0.68 | 18,579 | 73 | 110,568 | 0.66 | 1.03 (0.75–1.43) | 0.841 |
PY: person-year, KHNMC: Kyung Hee University Hospital at Gangdong, KHMC: Kyung Hee University Medical Center, EUMC: Ewha Womans University Medical Center, PNUH: Pusan National University Hospital, AUMC: Ajou University Medical Center, KDH: Kangdong Sacred Heart Hospital, KWMC: Kangwon National University Hospital, DCMC: Daegu Catholic University Medical Center, SCHSU: Soonchunhyang University Seoul Hospital, SCHBC: Soonchunhyang University Bucheon Hospital, SCHCA: Soonchunhyang University Cheonan Hospital.