Table 1.

Characteristics of ISOBCC participants by NMSC diagnosis during follow-up who were included in analyses of baseline serum micronutrient concentrations and NMSC risk

No NMSC
BCC*
SCC
n (%)n (%)Pn (%)P
Gender
    Male38 (54.3)174 (78.7)<0.000181 (95.3)<0.0001
    Female32 (45.7)47 (21.3)4 (4.7)
Age (y)
    40-4912 (17.1)21 (9.5)0.123 (3.5)0.004
    50-5924 (34.3)60 (27.2)20 (23.5)
    60-6927 (38.6)104 (47.0)46 (54.1)
    70+7 (10.0)36 (16.3)16 (18.8)
Clinic
    University of Arkansas12 (17.1)82 (37.1)<0.000152 (61.2)<0.0001
    Northwestern University45 (64.3)77 (34.8)20 (23.5)
    RPMI13 (18.6)62 (28.0)13 (15.3)
Skin type
    Never tans, always burns28 (40.0)92 (41.6)0.7137 (43.5)0.59
    Usually tans, always burns20 (28.6)68 (30.8)20 (23.5)
    Always tans, sometimes burns18 (25.7)55 (24.9)26 (30.6)
    Always tans, rarely burns4 (5.7)6 (2.7)2 (2.4)
Overall solar damage
    None or mild45 (64.3)80 (36.2)<0.000115 (17.6)<0.0001
    Moderate24 (34.3)108 (48.9)52 (61.2)
    Severe1 (1.4)33 (14.9)18 (21.2)
No. of BCCs in prior 5 years
    1-252 (74.3)65 (29.4)<0.000122 (25.9)<0.0001
    3-415 (21.4)81 (36.6)27 (31.8)
    5-62 (2.9)29 (13.1)20 (23.5)
    7+1 (1.4)46 (20.8)16 (18.8)
No. of SCCs in prior 5 years
    None66 (94.3)178 (80.5)0.00255 (64.7)<0.0001
    14 (5.7)25 (11.3)14 (16.5)
    2+0.018 (8.1)16 (18.8)
Treatment group
    Group A39 (55.7)105 (47.5)0.2339 (45.9)0.22
    Group B31 (44.3)116 (52.5)46 (54.1)
  • * Includes 147 subjects with only a BCC and 74 subjects with a BCC and a SCC.

  • Includes 11 subjects with only a SCC and 74 subjects with a SCC and a BCC.

  • P values from two-sided χ2 tests for comparisons with no NMSC (data column 1).