Skip to main content

Table 3 Prevalence of Behavioral Risk Factors and Breast Cancer Screening Among Female Kaiser Permanente Members Aged 40–65 in Marin County and East/Central Costa County, California

From: Differences in reproductive risk factors for breast cancer in middle-aged women in Marin County, California and a sociodemographically similar area of Northern California

  Marin East/Central Contra Costa p-value
  Base No. Percent (95% CI) Base No. Percent (95% CI)  
Smoking status 426   361   
Never smoked   48.3 (43.5 – 53.1)   61.7 (56.6 – 66.8) p = .0002
Former smoker   43.6 (38.8 – 48.3)   31.2 (26.3 – 36.0) p = .0004
Current smoker   7.7 (5.1 – 10.3)   7.2 (4.5 – 10.0) p = .80
Occasional   3.1 (1.4 – 4.8)   2.3 (0.7 – 3.9)  
Daily   4.9 (2.9 – 7.0)   4.9 (2.6 – 7.2)  
Alcohol use in past 12 mos. 417   360   
Never or <1/month   34.4 (29.8 – 39.0)   41.9 (36.7 – 47.0) p < .05
Averaged > 7 drinks/week   21.5 (17.5 – 25.4)   16.1 (12.3 – 19.9) p = .062
Averaged > 14 drinks/week   4.2 (2.3 – 6.0)   2.7 (1.0 – 4.4) p = .30
Exercise      
   Usual # days of moderate or strenuous exercise 426   362   p = .13
< 1 day/week   19.4 (15.6 – 23.2)   23.3 (18.9 – 27.7)  
1–2 days/week   11.9 (8.8 – 15.1)   15.8 (11.9 – 19.6)  
3–4 days/week   23.9 (19.8 – 27.9)   19.3 (15.2 – 23.4)  
≥ 5 days/week   44.8 (40.0 – 49.5)   41.6 (36.5 – 46.8)  
   Usual # days of ≥30 min of moderate/strenuous exercise 426   362   p = .16
< 1 day/week   31.1 (26.7 – 35.6)   37.7 (32.6 – 42.7)  
1–2 days/week   11.6 (8.4 – 14.6)   13.2 (9.7 – 16.8)  
3–4 days/week   20.7 (16.8 – 24.6)   18.1 (14.0 – 22.1)  
≥ 5 days/week   36.6 (32.0 – 41.2)   31.0 (26.1 – 35.9)  
BMI 424   357   p = .50
% Underwt (BMI 14 – < 18.5)   2.7 (1.1 – 4.3)   3.6 (1.7 – 5.6)  
% Normal-Overwt (BMI 18.5–<30)   81.5 (77.8 – 85.3)   78.4 (74.0 – 82.7)  
% Obese (BMI ≥ 30)   15.7 (10.3 – 19.2)   18.0 (14.0 – 22.0)  
Mammogram (ages 41–65) 418   346   p = .70
In last 2 years   88.5 (85.4 – 91.7)   88.6 (85.1 – 92.0)  
> 2 years ago   8.2 (5.5 – 10.8)   9.1 (6.0 – 12.2)  
Never   3.3 (1.4 – 5.1)   2.3 (0.6 – 4.1)