Table 2.

Sun exposure and NHL in the NSW and SCALE case-control studies (3, 18)

Sun exposureExposure categories, OR (95% CI): NSW study
Ptrend
1st quarter2nd quarter3rd quarter4th quarter
Total exposure10.72 (0.53-0.98)0.66 (0.48-0.91)0.65 (0.46-0.91)0.01
Nonworking days exposure10.83 (0.61-1.11)0.57 (0.42-0.79)0.47 (0.34-0.66)0.0001
Working days exposure10.98 (0.73-1.33)0.91 (0.66-1.25)0.95 (0.68-1.33)0.68
Vacation exposure in warmer months*10.78 (0.57-1.05)0.81 (0.59-1.10)0.65 (0.47-0.91)0.02
Sun exposure
Exposure categories, OR (95% CI)
Ptrend
SCALE study
Never<1/wk2-3/wk≥4/wk
Sunbathing at age 2010.8 (0.7-0.9)0.7 (0.6-0.9)0.7 (0.6-0.9)0.001
Never1-56-20>20
Sunny vacations abroad11.0 (0.9-1.1)0.9 (0.8-1.0)0.7 (0.6-0.8)<0.001
Never<1/y1/y≥2/y
Sunburns at age 2011.0 (0.9-1.2)0.8 (0.7-0.9)0.6 (0.5-0.8)<0.001
NCI-SEER study
<77-1314-27≥28
Hours per week in the midday sun in the last 10 y10.85 (0.62-1.18)0.75 (0.54-1.05)0.73 (0.46-1.15)0.07
None12-4≥5
History of blistering sunburns10.87 (0.62-1.23)1.02 (0.72-1.46)0.68 (0.47-0.97)0.10
  • * Pattern for vacations in cooler months was similar but more consistently downwards and with a smaller P.

  • Results were also presented for hours per week in the midday sun during teens, during twenties, and during thirties. The results were similar with ORs trending down to 0.75, 0.75, and 0.78 with ≥28 h of exposure, and Ps are somewhat higher.