TABLE 1.
Baseline characteristics by skin cancer status of 1322 participants of the Nambour Skin Cancer Study, 1997–2007
| Basal cell carcinoma |
Squamous cell carcinoma |
|||||
|---|---|---|---|---|---|---|
| Characteristics | Present (n = 318) n (%) |
Absent (n = 1004) n (%) |
P value* |
Present (n = 191) n (%) |
Absent (n = 1131) n (%) |
P value* |
| Sex | ||||||
| Male | 159 (50) | 421 (42) | 0.01 | 100 (52) | 480 (42) | 0.01 |
| Female | 159 (50) | 583 (58) | 91 (48) | 651 (58) | ||
| Age (mean ± SD) | 60 ± 12 | 52 ± 13 | <0.0001 | 6 3± 11 | 52 ± 13 | <0.0001 |
| Occupation (in/outdoors) | ||||||
| Mainly outdoors | 73 (23) | 173 (17) | 0.002 | 47 (25) | 199 (18) | 0.02 |
| Both | 130 (41) | 359 (36) | 75 (39) | 414 (37) | ||
| Mainly indoors | 115 (36) | 471 (47) | 69 (36) | 517 (46) | ||
| Pack-years smoked | ||||||
| Life-long non-smoker | 178 (56) | 562 (56) | 0.77 | 93 (49) | 647 (57) | 0.05 |
| ≤7 pack-years smoked | 52 (16) | 168 (17) | 32 (17) | 188 (17) | ||
| 7–20 pack-years smoked | 32 (10) | 117 (12) | 23 (12) | 126 (11) | ||
| ≥20 pack-years smoked | 56 (18) | 157 (16) | 43 (23) | 170 (15) | ||
| Skin color | ||||||
| Fair | 191 (60) | 544 (54) | 0.05 | 123 (64) | 612 (54) | 0.01 |
| Medium | 114 (36) | 385 (38) | 62 (32) | 437 (39) | ||
| Olive/black/brown | 13 (4) | 74 (8) | 6 (3) | 81 (7) | ||
| Skin type | ||||||
| Always burn | 78 (25) | 195 (19) | 0.06 | 67 (35) | 206 (18) | <0.0001 |
| Burn/tan | 216 (68) | 701 (70) | 110 (58) | 807 (71) | ||
| Only tan | 24 (8) | 107 (11) | 14 (7) | 117 (10) | ||
| Painful sunburns | ||||||
| Never | 48 (16) | 144 (15) | 0.25 | 28 (16) | 164 (15) | 0.92 |
| Once | 181 (60) | 592 (63) | 114 (64) | 659 (62) | ||
| 2–5 Burns | 43 (14) | 144 (15) | 25 (14) | 162 (15) | ||
| >5 Burns | 31 (10) | 64 (7) | 12 (7) | 83 (8) | ||
| Elastosis of the neck | ||||||
| None | 17 (6) | 191 (20) | <0.0001 | 4 (2) | 204 (19) | <0.0001 |
| Mild/moderate | 151 (51) | 539 (58) | 76 (43) | 614 (58) | ||
| Severe | 127 (43) | 207 (22) | 96 (55) | 238 (23) | ||
| Freckling on the back | ||||||
| None | 39 (13) | 199 (21) | 0.0001 | 19 (11) | 219 (21) | 0.0003 |
| Mild | 115 (40) | 417 (44) | 70 (40) | 462 (44) | ||
| Moderate | 86 (30) | 228 (24) | 50 (29) | 264 (25) | ||
| Severe | 51 (18) | 95 (10) | 34 (20) | 112 (11) | ||
| History of skin cancer | ||||||
| Yes | 198 (62) | 231 (23) | <0.0001 | 132 (69) | 297 (27) | <0.0001 |
| No | 120 (38) | 773 (77) | 59 (31) | 834 (74) | ||
*
P value from chi-square test (categorical data) or ANOVA (continuous data); significance p < 0.05.