Table 2

Residential sun exposure and breast cancer risk among white women: NHANES I Epidemiologic Follow-up Study, 1971–1975 to 1992

Breast cancer casesAge-adjusted RR (95% CI)Multivariate-adjusted RR (95% CI)a
Region of residenceb
 Northeast511.01.0
 Midwest480.82 (0.55–1.22)0.83 (0.56–1.23)
 West510.81 (0.55–1.20)0.78 (0.53–1.16)
 South400.66 (0.44–1.00)0.71 (0.47–1.09)
P for trendP = 0.06P = 0.11
Solar radiation at longest residencec
 Low831.01.0
 Medium671.13 (0.82–1.56)1.17 (0.85–1.62)
 High380.70 (0.48–1.03)0.73 (0.50–1.08)
P for trendP = 0.13P = 0.19
Solar radiation at place of birth
 Low791.01.0
 Medium640.97 (0.69–1.34)0.99 (0.72–1.39)
 High350.69 (0.46–1.02)0.73 (0.49–1.09)
P for trendP = 0.08P = 0.16
  • a Adjusted for age, education, age at menarche, age at menopause, body mass index, frequency of alcohol consumption, and physical activity.

  • b Northeast: Maine, Vermont, New Hampshire, Massachusetts, Connecticut, Rhode Island, New York, New Jersey, and Pennsylvania; Midwest: Ohio, Illinois, Indiana, Michigan, Wisconsin, Minnesota, Iowa, and Missouri; West: Washington, Oregon, California, Nevada, New Mexico, Arizona, Texas, Oklahoma, Kansas, Nebraska, North Dakota, South Dakota, Idaho, Utah, Colorado, Montana, and Wyoming; South: Delaware, Maryland, District of Columbia, West Virginia, Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana, and Arkansas.

  • c Low: Maine, Vermont, New Hampshire, Massachusetts, Connecticut, Rhode Island, New York, Pennsylvania, Ohio, Michigan, Minnesota, and Washington; Medium: New Jersey, Delaware, Maryland, District of Columbia, West Virginia, Virginia, North Carolina, South Carolina, Indiana, Kentucky, Tennessee, Wisconsin, Illinois, Iowa, Missouri, North Dakota, South Dakota, Montana, Oregon; High: Georgia, Florida, Alabama, Mississippi, Arkansas, Louisiana, Nebraska, Kansas, Oklahoma, Texas, Wyoming, Colorado, New Mexico, Idaho, Utah, Arizona, Nevada, and California.