Table 1.
Characteristics of NHS and HPFS participants by outcome stratum
| 1 NMSC | 2–4 NMSCs | 5–10 NMSCs | ‡11 NMSCs | |
|---|---|---|---|---|
| Total participants – no.(%) | ||||
| NHS (n = 61 194*) | 5689 (9†) | 4674 (8) | 1143 (2) | 383 (1) |
| HPFS (n = 19 081*) | 2061 (11) | 2331 (12) | 741 (4) | 237 (1) |
| 6+ Nevi on left arm – no. (%) | ||||
| NHS | 9179 (15) | 10 403 (17) | 11 015 (18) | 11 627 (19) |
| HPFS | 1546 (13) | 1783 (15) | 1783 (15) | 1546 (13) |
| Painful Burn/blistering sunburns‡– no. (%) | ||||
| NHS | 9791 (16) | 12 851 (21) | 15 910 (26) | 18 358 (30) |
| HPFS | 3210 (27) | 3686 (31) | 4399 (37) | 5350 (45) |
| Red or blonde natural hair colour§– no. (%) | ||||
| NHS | 11 015 (18) | 14 075 (23) | 15 299 (25) | 15 910 (26) |
| HPFS | 1664 (14) | 1902 (16) | 2140 (18) | 2616 (22) |
| History of 10+ severe sunburn – no. (%) | ||||
| NHS | 26 925 (44) | 31 821 (52) | 36 104 (59) | 39 776 (65) |
| HPFS | 2853 (24) | 3091 (26) | 3567 (30) | 4518 (38) |
| Prevalence of melanoma cases – no. (%) | ||||
| NHS | 612 (1) | 1224 (2) | 2448 (4) | 1836 (3) |
| HPFS | 119 (1) | 238 (2) | 476 (4) | 357 (3) |
| Family history of melanoma – no. (%) | ||||
| NHS | 4896 (8) | 6119 (10) | 6119 (10) | 6731 (11) |
| HPFS | 594 (5) | 594 (5) | 713 (6) | 476 (4) |
*
Total number of individuals in NHS or HPFS who satisfied the inclusion criteria of no prior malignancies.
†
Percentage of total population who satisfied the inclusion criteria.
‡
Sun reaction after 2 h of sun exposure during childhood.
§
Natural adult hair colour at age 20.