Table 5.

Study center, age at diagnosis, and association of a nevus with cutaneous malignant melanoma; stratified by melanoma location (trunk, limbs, head/neck)

CharacteristicMelanoma location
Pinteraction
Trunk
Limbs
Head/neck
nN−*nN+OR (95% CI)nN−nN+OR (95% CI)nN−nN+OR (95% CI)
Study center
    All melanomas:
        Ontario/British Columbia1131121.0141550.39 (0.25-0.60)44120.30 (0.15-0.60)0.59
        New South Wales94891.00 (0.67-1.48)128520.42 (0.27-0.65)5490.19 (0.09-0.40)
    Excluding LMM:
        Ontario/British Columbia1111121.0131550.41 (0.27-0.64)21110.53 (0.24-1.15)0.03
        New South Wales88871.01 (0.68-1.50)112510.46 (0.30-0.71)3420.06 (0.01-0.27)
Age
    All melanoma:
        <55 y97991.0124620.48 (0.31-0.75)19100.52 (0.23-1.17)0.06
        55+ y1101020.92 (0.62-1.36)145450.30 (0.19-0.47)79110.14 (0.07-0.27)
    Excluding LMM
        <55 y95991.0120620.49 (0.32-0.77)1490.62 (0.25-1.50)0.03
        55+ y1041000.93 (0.62-1.39)123440.34 (0.22-0.54)4140.09 (0.03-0.28)
  • * Counts may not sum to the total number of study subjects due to missing data.

  • Adjusted for sex and age (<55, 55+).

  • Adjusted for sex and study center (Ontario/British Columbia, New South Wales).