Table 1.
Meta-analysis for association with indoor tanning on the risk of skin cancer (overall and early-onset).
| Skin Cancer | Study N |
Summary RR (95% CI) |
Heterogeneity | |
|---|---|---|---|---|
| I2 (%) | P-Cochran | |||
| Overall | ||||
| Non-melanoma skin cancer 1 | 18 | 1.40 (1.18–1.65) | 77 | <0.01 |
| Squamous cell carcinoma | 9 | 1.58 (1.38–1.81) | 27 | 0.21 |
| Basal cell carcinoma | 10 | 1.24 (1.00–1.55) | 61 | <0.01 |
| Cutaneous melanoma | 36 | 1.27 (1.16–1.39) | 62 | <0.01 |
| Early-onset (Age < 50 years) 2 | ||||
| Non-melanoma skin cancer | 4 | 1.81 (1.38–2.37) | 50 | 0.11 |
| Squamous cell carcinoma | 1 | 1.99 (1.48–2.68) | - | - |
| Basal cell carcinoma | 3 | 1.79 (1.15–2.77) | 60 | 0.08 |
| Cutaneous melanoma | 2 | 1.75 (1.14–2.69) | 70 | 0.07 |
1 Non-melanoma skin cancer studies including two studies for NMSC, six for SCC, seven for BCC, and three for both SCC and BCC. 2 Diagnosed with skin cancer at age < 50 years.