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Table 3 Relative risks (RRs) and 95% CI of SCC (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

Type of physical activity Women with SCC/Total Age-adjusted RR (95% CI) Multivariablea RR (95% CI) Men with SCC/Total Age-adjusted RR (95% CI) Multivariablea RR (95% CI)
Recreational activity, total (hrs/wk)   (n = 665) (n = 650)   (n = 506) (n = 486)
   None 32/222 Reference Reference 33/202 Reference Reference
   F ≤ 1 M ≤ 1.5 18/153 0.88 (0.53, 1.48) 0.92 (0.56, 1.53) 17/105 0.82 (0.50, 1.36) 0.89 (0.54, 1.46)
   F ≤ 3 M ≤ 4 19/150 0.96 (0.57, 1.60) 1.04 (0.62, 1.74) 21/102 1.23 (0.78, 1.94) 1.29 (0.82, 2.04)
   F > 3 M > 4 21/140 0.87 (0.53, 1.41) 0.85 (0.52, 1.38) 27/97 1.45 (0.93, 2.25) 1.33 (0.86, 2.05)
p-trend   0.647 0.557   0.053 0.135
Walking (hrs/wk)       
   None 40/318 Reference Reference 43/304 Reference Reference
   F < 1 M < 1.2 17/105 1.30 (0.81, 2.10) 1.36 (0.85, 2.17) 11/68 0.99 (0.56, 1.74) 1.04 (0.59, 1.82)
   F < 2.5 M < 3.5 13/120 0.81 (0.44, 1.46) 0.99 (0.55, 1.78) 20/66 1.61 (1.06, 2.47) 1.64 (1.07, 2.51)
   F ≥ 2.5 M ≥ 3.5 20/122 0.98 (0.60, 1.62) 1.06 (0.65, 1.74) 24/68 1.63 (1.06, 2.50) 1.37 (0.90, 2.08)
p-trend   0.734 0.997   0.026 0.142
Moderate activity (hrs/wk)
   None 74/508 Reference Reference 72/362 Reference Reference
   F < 1.5 M < 1.7 8/80 0.72 (0.37, 1.43) 0.67 (0.35, 1.29) 13/72 0.88 (0.52, 1.48) 0.95 (0.58, 1.57)
   F ≥ 1.5 M ≥ 1.7 8/77 0.79 (0.41, 1.51) 0.66 (0.35, 1.27) 13/72 0.96 (0.58, 1.60) 1.05 (0.64, 1.70)
p-trend   0.389 0.141   0.859 0.868
Vigorous activity (hrs/wk)
   None 85/612 Reference Reference 92/442 Reference Reference
   F ≤ 8 M ≤ 12 5/53 1.49 (0.69, 3.21) 1.30 (0.63, 2.65) 6/64 1.02 (0.47, 2.21) 1.08 (0.54, 2.18)
p-value   0.410 0.533   0.953 0.831
Recreational activity, total (MET-hr/wk)
   Sedentary 32/222 Reference Reference 33/202 Reference Reference
   F ≤ 3.7 M ≤ 6 19/151 0.98 (0.55, 1.52) 0.96 (0.58, 1.57) 19/100 0.93 (0.58, 1.50) 1.01 (0.63, 1.61)
   F ≤10.7 M ≤ 18 21/146 0.96 (0.58, 1.58) 1.07 (0.64, 1.81) 23/105 1.16 (0.74, 1.82) 1.16 (0.74, 1.83)
   F > 10.7 M > 18 18/146 0.82 (0.50, 1.37) 0.78 (0.47, 1.30) 23/99 1.41 (0.88, 2.23) 1.31 (0.84, 2.06)
p-trend   0.481 0.318   0.114 0.208
Occupational activity       
   Sedentary 25/217 Reference Reference 23/127 Reference Reference
   Standing 9/93 0.85 (0.55, 1.32) 0.69 (0.46, 1.05) 37/183 0.84 (0.54, 1.30) 0.89 (0.58, 1.36)
   Manual 50/288 0.70 (0.37, 1.34) 0.64 (0.33, 1.24) 35/143 1.00 (0.68, 1.48) 1.13 (0.76, 1.69)
p-value   0.456 0.131   0.663 0.532
  1. a Model adjusted for age (years), treatment allocation, elastosis of the neck, freckling of the back and skin cancer history