Role of occupational and recreational sun exposure as a risk factor for keratinocytic non-melanoma skin cancers: an Italian multicentre case-control study

Sun exposure is the main external risk factor for keratinocytic non-melanoma skin cancer (NMSC). Outdoor workers are at increased risk but the relationship of NMSC with occupational solar exposure is often confounded by concurrent recreational sun exposure. We compared the percentage of outdoor workers in NMSC patients versus controls without history of NMSC and assessed occupational and recreational sun exposure in both groups, evaluating also other risk factors and use of protective measures.