TABLE 6.
Demographic, Clinical, and Pathological Characteristics of Melanoma Based on Tanning Bed Exposure
| Variable, No. (%) | Tanners (n = 70) | Nontanners (n = 258) | P |
|---|---|---|---|
|
| |||
| Age, median (IQR), y | 40 (30–49) | 53 (44–63) | <.0001 |
| Stage, No. (%) | .0040 | ||
| 0 | 5 (7) | 7 (3) | |
| I | 44 (64) | 114 (48) | |
| II | 7 (10) | 78 (33) | |
| III | 12 (17) | 39 (16) | |
| IV | 1 (1) | 2 (1) | |
| Sex, No. (%) | <.0001 | ||
| Female | 60 (86) | 139 (54) | |
| Male | 10 (14) | 119 (46) | |
| Location, No. (%) | .0664 | ||
| UE | 8 (12) | 70 (27) | |
| LE | 24 (35) | 65 (25) | |
| Trunk | 29 (42) | 93 (36) | |
| HN | 8 (12) | 29 (11) | |
| Atypical moles, No. (%) | <.0001 | ||
| Yes | 30 (43) | 40 (16) | |
| No | 40 (57) | 218 (84) | |
| Breslow thickness, No. (%) | <.0001 | ||
| <1 mm | 47 (67) | 87 (35) | |
| 1 to <2 mm | 14 (20) | 79 (31) | |
| 2 to <4 mm | 7 (10) | 47 (19) | |
| ≥4 mm | 2 (3) | 39 (15) | |
| Dysplastic nevi, No. (%) | .2251 | ||
| Yes | 10 (14) | 24 (9) | |
| No | 60 (86) | 234 (91) | |
| Benign nevi, No. (%) | <.0001 | ||
| >15 | 16 (23) | 128 (50) | |
| <15 | 54 (77) | 130 (50) | |
| Mutated (yes) | 4 (6) | 20 (8) | |
| Ulceration, No. (%) | <.0001 | ||
| Yes | 6 (9) | 53 (21) | |
| No | 64 (91) | 199 (79) | |
| Synchronous MPM, No. (%) | .0020 | ||
| Yes | 8 (20) | 11 (6) | |
| No | 32 (80) | 188 (94) | |
| >1 second primary, No. (%) | <.0001 | ||
| Yes | 13 (29) | 13 (6) | |
| No | 32 (71) | 188 (94) | |
| Breslow thickness of second primary, No. (%) | .6666 | ||
| <1 mm | 29 (76) | 52 (78) | |
| 1 to <2 mm | 8 (21) | 10 (15) | |
| 2 to <4 mm | 1 (2) | 3 (4) | |
| ≥4 mm | 0 (0) | 2 (3) | |
| Stage of second primary, No. (%) | .1516 | ||
| 0 | 13 (34) | 13 (19) | |
| I | 19 (50) | 49 (70) | |
| II | 4 (11) | 6 (9) | |
| III | 2 (5) | 1 (1) | |
| IV | 0 (0) | 1 (1) | |
Abbreviations: HN, head and neck; IQR, interquartile range; LE, lower extremity; MPM, multiple primary melanoma; UE, upper extremity.