Table 1. Basic Characteristics by Melanoma Thickness in Patients With NM or SSM .
| Characteristic | Patients With NM (n = 147) | Patients With SSM (n = 538) | ||||
|---|---|---|---|---|---|---|
| Tumor ≤2 mm | Tumor >2 mm | P Value | Tumor ≤2 mm | Tumor >2 mm | P Value | |
| Patients, No. (%) | 40 (27) | 107 (73) | 437 (81) | 101 (19) | ||
| Age, mean (SD), y | 58 (15) | 59 (16) | .72 | 53 (14) | 61 (16) | <.001a |
| Sex, No. (%) | .50 | .25 | ||||
| Male | 23 (25) | 68 (75) | 219 (79) | 57 (21) | ||
| Female | 17 (30) | 39 (70) | 218 (83) | 44 (17) | ||
| Marital status, No. (%)b | .09 | .62 | ||||
| Married | 21 (22) | 74 (78) | 316 (82) | 70 (18) | ||
| Widowed/single never-married/divorced or separated | 18 (35) | 33 (65) | 116 (80) | 29 (20) | ||
| Education, No. (%)c | .45 | <.001a | ||||
| Associate’s degree/graduated from college/postgraduate | 23 (30) | 53 (70) | 277 (87) | 42 (13) | ||
| Secondary/high school | 17 (25) | 52 (75) | 156 (73) | 58 (27) | ||
| Skin color, No. (%) | .30 | .82 | ||||
| Very fair/fair | 36 (29) | 89 (71) | 376 (81) | 86 (19) | ||
| Dark/olive/very dark | 4 (18) | 18 (82) | 61 (80) | 15 (20) | ||
| No. of nevi, No. (%) | .22 | .49 | ||||
| 0-20 | 22 (23) | 75 (77) | 270 (81) | 64 (19) | ||
| 20-50 | 12 (38) | 20 (63) | 100 (79) | 26 (21) | ||
| >50 | 6 (33) | 12 (67) | 67 (86) | 11 (14) | ||
| No. of atypical nevi, No. (%) | .70 | .94 | ||||
| 0 | 19 (24) | 61 (76) | 226 (82) | 49 (18) | ||
| 1-5 | 8 (32) | 17 (68) | 97 (84) | 19 (16) | ||
| >6 | 5 (28) | 13 (72) | 66 (83) | 14 (17) | ||
| Histopathologic ulceration, No. (%)d | .002a,e | <.001a,e | ||||
| No | 25 (39) | 39 (61) | 382 (88) | 51 (12) | ||
| Yes | 12 (16) | 65 (84) | 53 (53) | 47 (47) | ||
| Unknown | 2 (50) | 2 (50) | 1 (33) | 2 (67) | ||
| Location of melanoma, No. (%)f | .91 | .05 | ||||
| Head/neck | 8 (29) | 20 (71) | 39 (75) | 13 (25) | ||
| Trunk | 14 (24) | 44 (76) | 199 (84) | 37 (16) | ||
| Upper extremity | 6 (30) | 14 (70) | 81 (86) | 13 (14) | ||
| Lower extremity | 12 (30) | 28 (70) | 110 (81) | 36 (25) | ||
Abbreviations: NM, nodular melanoma; SSM, superficial spreading melanoma.
a
Statistically significant.
b
Eight missing values.
c
Seven missing values.
d
Four missing values.
e
Fisher exact test.
f
Eleven missing values.