Research Article
Weight Fluctuation and Postmenopausal Breast Cancer in the National Health and Nutrition Examination Survey I Epidemiologic Follow-Up Study
Table 1
Demographics and baseline characteristics.
| | Characteristics | Cases
| Controls
|
| | Age of diagnosis/years of follow-up (%) | | | | 50–60 | 41 (51.90%) | | 61–70 | 21 (26.58%) | | 71–80 | 14 (17.72%) | | 80 and above | 3 (3.80%) | | Mean (standard deviation) | 62.82 (9.26) | | Minimum-maximum | 50–87 |
| | BMI at age 25 | | | | Mean (standard deviation) | 21.11 (2.65) | | Minimum-maximum | 16.83–33.77 |
| | BMI status at age 25 | | | | Underweight | 9 (11.39%) | | Normal | 65 (82.28%) | | Overweight | 4 (5.06%) | | Obese | 1 (1.27%) |
| | Live births | | | | 0 | 12 (15.19%) | 10 (12.66%) | | 1 or more | 67 (84.81%) | 69 (87.34%) |
| | Age > 30 for birth of first child | | | | Yes () | 4 (5.06%) | 4 (5.06%) | | No () | 64 (81.01%) | 68 (86.08%) | | N/A | 11 (13.92%) | 7 (8.86%) |
| | History of BC female relatives (mother) | | | | Yes | 13 (16.46%) | 16 (20.25%) | | No | 66 (83.54%) | 63 (79.75%) |
| |
Have ever used hormone therapy (HRT) | | | | Yes | 6 (7.59%) | 34 (43.04%) | | No | 73 (92.41%) | 45 (56.96%) |
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