Table 3.

Indicators of sun exposure and association of a nevus with cutaneous malignant melanoma (N = 932)

CharacteristicnN−* (%)nN+* (%)ORcrude (95% CI)ORadj (95% CI)
Anatomic location of melanoma
    Trunk207 (51)201 (49)1.01.0
    Head/neck98 (82)21 (18)0.2 (0.1-0.4)0.3 (0.2-0.4)
    Upper limb127 (73)47 (27)0.4 (0.3-0.6)0.4 (0.3-0.6)
    Lower limb142 (70)60 (30)0.4 (0.3-0.6)0.4 (0.3-0.6)
    Other/NOS19 (66)10 (35)0.5 (0.3-1.2)0.5 (0.2-1.1)
    P
Solar elastosis in adjacent tissue
    None228 (56)180 (44)1.01.0
    Mild/moderate216 (63)127 (37)0.8 (0.6-1.0)0.7 (0.5-1.0)
    Marked115 (85)20 (15)0.2 (0.1-0.4)0.2 (0.1-0.4)
        Ptrend<0.0001<0.0001
History of nonmelanoma skin cancer
    No444 (62)269 (38)1.01.0
    Yes134 (68)62 (32)0.8 (0.6-1.1)0.9 (0.6-1.2)
    P0.120.37
Total hours of sun exposure during decade years
    Overall
        0-2,200149 (61)95 (39)1.01.0
        2,201-3,600154 (64)87 (36)0.9 (0.6-1.3)0.8 (0.6-1.2)
        3,601-5,400146 (65)79 (35)0.8 (0.6-1.2)0.9 (0.6-1.4)
        >5,400133 (65)72 (35)0.8 (0.6-1.2)1.0 (0.6-1.5)
        Ptrend0.380.90
    On nonworking days only
        0-1,100141 (61)90 (39)1.01.0
        1,101-1,600134 (62)81 (38)0.9 (0.6-1.4)0.9 (0.6-1.3)
        1,601-2,300151 (64)84 (36)0.9 (0.6-1.3)0.8 (0.5-1.2)
        >2,300156 (67)78 (33)0.8 (0.5-1.1)0.8 (0.5-1.2)
        Ptrend0.180.32
    On working days only
        0-900180 (62)109 (38)1.01.0
        901-1,700142 (66)74 (34)0.9 (0.6-1.4)0.8 (0.6-1.2)
        1,701-3,000129 (64)74 (36)0.9 (0.6-1.3)1.0 (0.7-1.5)
        >3,000131 (63)76 (37)0.8 (0.5-1.1)1.1 (0.7-1.7)
        Ptrend0.890.59
    To the melanoma site
        0-800126 (59)89 (41)1.01.0
        801-2,000141 (59)99 (41)1.1 (0.7-1.6)1.0 (0.7-1.5)
        2,001-3,800139 (63)82 (37)1.0 (0.7-1.6)1.0 (0.7-1.5)
        >3,800176 (74)63 (26)0.9 (0.6-1.3)0.9 (0.6-1.4)
        Ptrend0.480.61
  • * Counts may not sum to the total number of study subjects due to missing data.

  • Adjusted for study center, sex, and age.

  • Adjusted for anatomic location of melanoma.