Table 3.
Outcome effect sizes for studies included in subset analyses of high dose exposure and young age at exposure
| Reference | Exposure/age | Odds ratio (95% CI) | |
|---|---|---|---|
| Basal cell carcinoma | Squamous cell carcinoma | ||
| Studies assessing high dose exposure to indoor tanning | |||
| Bakos et al17 | “Regular use of tanning beds in lifetime” | 25.0 (2.26 to 277.36) | — |
| Ferrucci et al20 | 6-26 years of “regular”’ exposure | 2.16 (1.34 to 3.48) | — |
| Walther et al28 | >5 exposures per year | 0.7 (0.3 to 1.5) | — |
| Zhang et al29 | 4 exposures per year | 1.15 (1.11 to 1.19)* | 1.15 (1.01 to 1.31)* |
| Summary relative risk | 1.50 (0.81 to 2.77) | ||
| Studies assessing young age at exposure to indoor tanning | |||
| Ferrucci et al20 | ≤16 years of age | 1.83 (1.12 to 2.97) | — |
| Karagas et al25 | <20 years of age | 1.8 (1.0 to 3.0) | 3.66 (1.9 to 6.9) |
| Zhang et al29 | “High school/college” | 1.38 (1.27 to 1.5)† | 1.21 (0.85 to 1.71)† |
| Summary relative risk | 1.40 (1.29 to 1.52) | 2.02 (0.70 to 5.86) | |
*Hazard ratio (95% CI).
†Hazard ratio (95% CI) obtained directly from authors.