Table 2.
Odds ratio for lymphoma according to measures of sun exposure 5–10 years ago, Rochester, New York, 2005–2007.
| Sun variable measure |
Controls n=139 | All lymphoma cases |
Only NHL cases |
|||
|---|---|---|---|---|---|---|
| Variable | Level | Cases n=140 | Adjusted odds ratio (95% confidence interval)a,b | Cases n=129 | Adjusted odds ratio (95% confidence interval)b,c | |
| Sun exposure hours | 0–2 hrs/week | 6 | 7 | 1.0 (reference) | 7 | 1.0 (reference) |
| 3–5 hrs/week | 20 | 20 | 0.48 (0.11–2.14) | 19 | 0.44 (0.10–2.01) | |
| 6–8 hrs/week | 29 | 33 | 0.75 (0.18–3.24) | 31 | 0.76 (0.17–3.35) | |
| >8 hrs/week | 84 | 80 | 0.47 (0.12–1.90) | 72 | 0.44 (0.11–1.84) | |
| ptrend | 0.38 | 0.36 | ||||
| Sunbathing with the intention to tan | Never | 85 | 104 | 1.0 (reference) | 98 | 1.0 (reference) |
| Once/wk or less | 28 | 25 | 0.64 (0.30–1.39) | 21 | 0.52 (0.23–1.19) | |
| >1/week | 26 | 11 | 0.28 (0.10–0.79) | 10 | 0.27 (0.09–0.78) | |
| ptrend | 0.02 | 0.01 | ||||
| Sore sunburnd | No | 73 | 89 | 1.0 (reference) | 85 | 1.0 (reference) |
| Yes | 66 | 50 | 0.88 (0.42–1.84) | 43 | 0.85 (0.39–1.82) | |
| Blistering sunburnd | No | 106 | 121 | 1.0 (reference) | 113 | 1.0 (reference) |
| Yes | 33 | 18 | 0.68 (0.28–1.65) | 15 | 0.71 (0.28–1.81) | |
| Tanning bed use | No | 115 | 124 | 1.0 (reference) | 115 | 1.0 (reference) |
| Yes | 24 | 16 | 1.85 (0.67–5.10) | 14 | 1.81 (0.63–5.21) | |
| Outdoor occupatione | 98 | |||||
| No | 92 | 108 | 1.0 (reference) | 1.0 (reference) | ||
| Yes | 42 | 32 | 0.52 (0.27–1.01) | 31 | 0.62 (0.31, 1.23) | |
| Sunscreen use | Most of the time | 19 | 17 | 1.0 (reference) | 15 | 1.0 (reference) |
| About 1/2 the time | 20 | 23 | 1.25 (0.44–3.56) | 21 | 1.22 (0.41–3.62) | |
| Once in a while | 44 | 56 | 0.93 (0.36–2.37) | 53 | 0.98 (0.37–2.60) | |
| Never | 56 | 44 | 0.66 (0.26–1.69) | 40 | 0.65 (0.24–1.74) | |
| ptrend | 0.22 | 0.25 | ||||
a
n=273 for the multivariable analysis (all lymphoma cases);
b
Adjusted for gender, age 5–10 yrs ago (continuous), race (black, white, other), skin cancer diagnosis, known family history of lymphoma, known family history of other cancer, BMI (normal weight, overweight, obese), alcohol use as of 5–10 yrs ago (ever/never) and all of the other sun exposure variables in the table;
c
n=262 for the multivariate analysis (NHL cases only);
d
Numbers do not sum to 140 cases due to missing data for 1 (0.3%) case in each of these variables;
e
Numbers do not sum to 139 controls due to missing data for 5 (1.8%) controls in this variable