Table 2 Odds ratios (OR) and 95% confidence intervals (CI) from a fully saturated discrete-time logistic regression model, comparing the risk of a first cancer in the general population with that of a second cancer in skin cancer survivors
From: New malignancies after squamous cell carcinoma and melanomas: a population-based study from Norway
| Â | CMM | SCC | ||
|---|---|---|---|---|
| Â | Events/Pyr1 | OR (95% CI) | Events/Pyr | OR (95% CI) |
Primary skin cancer | Â | Â | Â | Â |
 No | 143 978/31.0 mill | 1.00 ref | 144 179/31.0 mill | 1.00 ref |
 Yes | 3662/288 823 | 1.53 (1.48,1.59) | 5612/175 641 | 2.30 (2.22,2.37) |
Sex | Â | Â | Â | Â |
 Female | 72 768/15.8 mill | 1.00 ref | 72 319/15.7 mill | 1.00 ref |
 Male | 75 206/15.4 mill | 1.28 (1.26,1.29) | 77 472/15.4 mill | 1.31 (1.29,1.32) |
Age 2 | Â | Â | Â | Â |
 20-40 years | 6447/12.0 mill | 1.00 ref | 6509/12.0 mill | 1.00 ref |
 40-59 years | 30 795/10.6 mill | 5.37 (5.22,5.52) | 30 241/10.5 mill | 5.28 (5.14,5.43) |
 ≥ 60 years | 110 732/8.6 mill | 20.58 (20.04,21.14) | 113 041/8.6 mill | 20.34 (19.80,20.9) |
Residential region 3 | Â | Â | Â | Â |
 North | 21 277/6.0 mill | 1.00 ref | 21 323/6.0 mill | 1.00 ref |
 Mid | 34 586/7.2 mill | 1.30 (1.27,1.32) | 34878/7.2 mill | 1.30 (1.28,1.32) |
 South | 92 111/18.0 mill | 1.33 (1.31,1.35) | 93 590/17.9 mill | 1.35 (1.33,1.37) |
Calendar period 2 | Â | Â | Â | Â |
 < 1965 | 8477/4.3 mill | 1.00 ref | 8354/4.3 mill | 1.00 ref |
 1965-1974 | 20 484/5.4 mill | 2.54 (2.47,2.61) | 20 867/5.4 mill | 2.62 (2.56,2.6) |
 1975-1984 | 27 276/5.9 mill | 3.63 (3.54,3.73) | 27 573/5.9 mill | 3.73 (3.63,3.83) |
 1985-1994 | 33 071/6.3 mill | 4.28 (4.17,4.40) | 33 817/6.3 mill | 4.45 (4.34,4.57) |
 1995-2004 | 40 142/6.6 mill | 5.33 (5.19,5.47) | 40 241/6.6 mill | 5.41 (5.27,5.56) |
 ≥ 2005 | 18 524/2.7 mill | 5.99 (5.82,6.17) | 18 939/2.6 mill | 6.22 (6.04,6.40) |
Educational level 4 | Â | Â | Â | Â |
 ≤ Primary school | 15 926/1.9 mill | 1.00 ref | 16 141/1.9 mill | 1.00 ref |
 Secondary school | 67 042/11.8 mill | 0.32 (0.31,0.33) | 67 915/11.8 mill | 0.32 (0.31,0.33) |
 Some college | 35 646/7.0 mill | 0.30 (0.29,0.31) | 36 079/7.0 mill | 0.30 (0.29,0.30) |
 ≥ College degree | 29 360/10.5 mill | 0.30 (0.29,0.31) | 29 656/10.4 mill | 0.30 (0.30,0.31) |
Marital status 3 | Â | Â | Â | Â |
 Not married | 47 085/15.7 mill | 1.00 ref | 47 881/15.7 mill | 1.00 ref |
 Married | 100 889/15.5 mill | 1.25 (1.24,1.27) | 101 910/15.4 mill | 1.27 (1.25,1.28) |
Parental status 4 | Â | Â | Â | Â |
 No children | 138 424/28.9 mill | 1.00 ref | 139 451/28.9 mill | 1.00 ref |
 Children | 9550/2.3 mill | 0.95 (0.93,0.97) | 10 340/2.2 mill | 0.96 (0.94,0.98) |
Income (annual) 3 | Â | Â | Â | Â |
 $ 05 | 60 395/9.1 mill | 1.00 ref | 62 871/9.1 mill | 1.00 ref |
 $ 80–9 999 | 40 528/10.7 mill | 0.92 (0.90,0.93) | 40 556/10.7 mill | 0.91 (0.90,0.92) |
 $ 10 000–19 999 | 34 425/8.7 mill | 0.80 (0.79,0.82) | 34 394/8.7 mill | 0.80 (0.78,0.80) |
 $ 20 000–39 999 | 11 582/2.6 mill | 0.78 (0.77,0.80) | 11 140/2.5 mill | 0.76 (0.74,0.78) |
 $ ≥ 40 000 | 1044/153 034 | 0.82 (0.77,0.87) | 830/122 013 | 0.78 (0.73,0.84) |