Characteristics of Mexican controls by European genetic ancestry, 2004 to 2007
| European genetic ancestry | P* | ||||
|---|---|---|---|---|---|
| <25 | 26-50 | 51-75 | 76-100 | ||
| Age (y)† | 51.9 (9) | 51.3 (9) | 50.9 (9) | 51.3 (10) | 0.954 |
| BMI premenopausal women† | 29.7 (5) | 30.3 (5) | 30.7 (6) | 30.8 (5) | 0.592 |
| BMI postmenopausal women† | 30.4 (5) | 31.3 (5) | 30.2 (5) | 34.7 (8) | 0.070 |
| Age at menarche (y)† | 12.9 (2) | 12.8 (2) | 12.9 (2) | 13.2 (2) | 0.332 |
| No. of full-term pregnancies† | 3.6 (2) | 3.9 (3) | 3.4 (2) | 4.1 (3) | 0.073 |
| Ever breast-fed (%)‡ | 90.7 | 89.7 | 85.0 | 100.0 | 0.278 |
| Family history of breast cancer (%) | 2.4 | 3.5 | 7.4 | 10.0 | 0.034 |
| Benign breast disease (%) | 6.8 | 8.0 | 7.4 | 10.0 | 0.768 |
| Postmenopausal HRT use (%)§ | 14.7 | 12.7 | 21.1 | 16.7 | 0.266 |
| Postmenopausal (%) | 54.7 | 56.5 | 53.3 | 60.0 | 0.891 |
| Alcohol consumption (ever in past year/never; %) | 11.7 | 10.1 | 12.2 | 11.1 | 0.761 |
| Socioeconomic status (%) | <0.001 | ||||
| Low | 42.3 | 28.0 | 25.0 | 0.0 | |
| Middle | 31.5 | 36.9 | 29.7 | 33.3 | |
| High | 26.2 | 34.9 | 45.3 | 66.7 | |
| Education (%) | <0.001 | ||||
| None | 11.8 | 7.3 | 4.4 | 0.0 | |
| Some elementary school | 32.4 | 24.6 | 17.8 | 0.0 | |
| Completed elementary school | 24.9 | 29.6 | 40.7 | 50.0 | |
| High school graduate | 23.3 | 27.8 | 22.2 | 30.0 | |
| College graduate | 5.1 | 5.8 | 8.9 | 0.0 | |
| Postgraduate studies | 2.4 | 4.8 | 5.9 | 20.0 | |
| Caloric intake (kcal/d)† | 1819.4 (584) | 1955.9 (682) | 2132.1 (761) | 2413.4 (1070) | <0.001 |