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Table 1 Descriptive features of the cohort of persons with a first primary cutaneous malignant melanoma (CMM) or squamous cell carcinoma (SCC) at time of the primary skin cancer diagnosis

From: New malignancies after squamous cell carcinoma and melanomas: a population-based study from Norway

  CMM SCC
  Women % Men % Women % Men %
Age at 1 st diagnosis         
20-40 3249 21.5 1943 15.0 248 2.3 270 2.0
40-59 5435 35.9 4908 38.0 1201 11.0 1492 10.9
≥ 60 6452 42.6 6082 47.0 9474 86.7 11 935 87.1
Age (median) 55.6   57.4   75.4   73.2  
Anatomical site         
Head/neck 2148 14.2 2025 15.7 6560 60.0 8809 64.3
Trunk 4353 28.8 7044 54.4 1659 15.2 2071 15.1
Arm 2346 15.5 1188 9.2 1103 10.1 1281 9.4
Leg/foot 5633 37.2 1786 13.8 1060 9.7 737 5.4
Other sites 656 4.3 890 6.9 541 5.0 799 5.8
Residential region         
South 10 875 71.9 9270 71.7 7878 72.1 9537 69.6
Mid 2998 19.8 2525 19.5 2235 20.5 2877 21.0
North 1263 8.3 1138 8.8 810 7.4 1283 9.4
Educational level         
≤ Primary school 496 3.3 617 4.8 420 3.8 653 4.8
Secondary school 5199 34.4 3446 26.6 5678 52.0 5847 42.7
Some college 4545 30.0 3271 25.3 3106 28.4 3359 24.5
≥ College degree 4896 32.3 5599 43.3 1719 15.8 3830 28.0
Marital status         
Not married 6270 41.4 3515 27.2 6981 63.9 4641 33.9
Married 8866 58.6 9418 72.8 3942 36.1 9056 66.1
Parental status         
No children 3875 25.6 2989 23.1 3855 35.3 4226 30.9
Children 11 261 74.4 9944 76.9 7068 64.7 9471 69.1
Annual income         
No or missing 6467 42.7 4118 31.8 8930 81.7 9523 69.5
$ 1-9999 2573 17.0 1639 12.7 801 7.3 1609 11.8
$ 10 000–19 999 1712 11.3 1283 9.9 320 3.0 567 4.1
$ 20 000–39 999 2326 15.4 2166 16.8 462 4.2 782 5.7
$ ≥ 40 000 2058 13.6 3727 28.8 410 3.8 1216 8.9
Duration of follow-up (years)        
0.0-2.0 2551 16.9 3050 23.6 2642 24.2 3491 25.5
2.1-5.0 2938 19.4 3235 25.0 3019 27.6 3875 28.3
5.1-10.0 3044 20.1 2610 20.2 2658 24.3 3427 25.0
10.1-15.0 2261 14.9 1577 12.2 1398 12.8 1655 12.1
15.1-20.0 1720 11.4 1088 8.4 648 6.0 690 5.0
20.1-25.0 1109 7.3 615 4.8 289 2.6 313 2.3
≥ 25.1 1513 10.0 758 5.8 269 2.5 246 1.8
Total number 15 136 100 12 933 100 10 923 100 13 697 100
No subsequent cancer 13 078 86.4 10 995 85.0 9030 82.7 9978 72.9
Any subsequent cancer 2058 13.6 1938 15.0 1893 17.3 3719 27.1