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Table 4 Relative risks (RRs) and 95% CI of SCC counts (1992-2007) according to type of physical activity, stratified by sex

From: Prospective study of physical activity and risk of squamous cell carcinoma of the skin

   Women Men
Type of physical activity Tumour count Age-adjusted RR (95% CI) Multivariablea RR (95% CI) Tumour count Age-adjusted RR (95% CI) Multivariablea RR (95% CI)
Recreational activity, total (hrs/wk)   (n = 665) (n = 650)   (n = 506) (n = 486)
   None 62 Reference Reference 59 Reference Reference
   F ≤ 1 M ≤ 1.5 27 0.79 (0.42, 1.49) 0.89 (0.48, 1.65) 57 1.09 (0.58, 2.07) 1.03 (0.55, 1.94)
   F ≤ 3 M ≤ 4 29 0.91 (0.48, 1.70) 0.97 (0.52, 1.79) 41 1.18 (0.60, 2.32) 1.20 (0.61, 2.35)
   F > 3 M > 4 31 0.75 (0.41, 1.39) 0.76 (0.42, 1.38) 62 1.77 (0.93, 3.37) 1.71 (0.91, 3.21)
p-trend   0.454 0.409   0.073 0.076
Walking (hrs/wk)       
   None 74 Reference Reference 78 Reference Reference
   F < 1 M < 1.2 28 1.21 (0.64, 2.26) 1.41 (0.76, 2.62) 30 1.06 (0.52, 2.20) 1.40 (0.68, 2.89)
   F < 2.5 M < 3.5 14 0.60 (0.29, 1.25) 0.72 (0.35, 1.48) 52 1.99 (1.02, 3.90) 1.93 (0.99, 3.76)
   F ≥ 2.5 M ≥ 3.5 33 1.06 (0.59, 1.90) 1.12 (0.63, 2.01) 59 1.99 (1.04, 3.81) 1.59 (0.85, 2.98)
p-trend   0.945 0.921   0.027 0.149
Moderate activity1 (hrs/wk)
   None 121 Reference Reference 157 Reference Reference
   F < 1.5 M < 1.7 17 1.00 (0.50, 2.02) 0.83 (0.42, 1.65) 33 1.18 (0.59, 2.38) 1.00 (0.52, 1.92)
   F ≥ 1.5 M ≥ 1.7 11 0.66 (0.29, 1.50) 0.60 (0.27, 1.34) 29 0.95 (0.46, 1.96) 1.22 (0.59, 2.51)
p-trend   0.325 0.192   0.912 0.599
Vigorous activity2 (hrs/wk)
   None 144 Reference Reference 211 Reference Reference
   F ≤ 8 M ≤ 12 5 1.03 (0.32, 3.27) 0.90 (0.29, 2.85) 8 0.78 (0.29, 2.09) 0.73 (0.27, 1.96)
   p-value   0.961 0.861   0.626 0.534
Recreational activity, total (MET-hr/wk)
   Sedentary 62 Reference Reference   Reference Reference
   F ≤ 3.7 M ≤ 6 28 0.81 (0.43, 1.51) 0.91 (0.49 1.68) 59 1.05 (0.55, 2.02) 1.02 (0.54, 1.94)
   F ≤ 10.7 M ≤ 18 31 0.89 (0.48, 1.65) 0.98 (0.53, 1.82) 54 1.37 (0.72, 2.60) 1.35 (0.72, 2.53)
   F > 10.7 M > 18 28 0.74 (0.40, 1.39) 0.73 (0.40, 1.33) 57 1.64 (0.83, 3.23) 1.60 (0.83, 3.09)
p-trend   0.438 0.320 49 0.125 0.134
Occupational activity       
   Sedentary 35 Reference Reference   Reference Reference
   Standing 11 0.72 (0.42, 1.23) 0.53 (0.32, 0.91) 52 0.89 (0.49, 1.61) 0.92 (0.51, 1.65)
   Manual 96 0.46 (0.22, 1.10) 0.48 (0.22, 1.07) 72 0.89 (0.51, 1.53) 0.90 (0.53, 1.53)
p-value   0.155 0.027 84 0.891 0.925
  1. a Model adjusted for age (years), treatment allocation, elastosis of the neck, freckling of the back and skin cancer history