Table 1.
Age-adjusted characteristics of this Nurses’ Health Study cohort in 1992, stratified by own birthweight
| Variable | < 2.5 kg | 2.5–3.175 kg | 3.2–3.85 kg | 3.9–4.54 kg | >4.54 kg | Not sure/missing |
|---|---|---|---|---|---|---|
| Women (n) | 7614 | 21499 | 31036 | 7614 | 1618 | 17,696 |
| Mean age (years) | 58.7 | 58.7 | 58.7 | 58.7 | 58.8 | 58.8 |
| Born more than 2 weeks premature† (%) | 35.9 | 2.8 | 0.7 | 0.3 | 0.3 | 1.3 |
| History of diabetes (%) | 6.3 | 3.7 | 3.7 | 4.0 | 4.4 | 3.7 |
| Maternal history of diabetes (%)†† | 8.9 | 8.4 | 9.2 | 11.8 | 17.4 | 10.0 |
| Oral contraceptive use (%) | 48.9 | 48.2 | 47.7 | 47.2 | 46.9 | 45.1 |
| Current post-menopausal hormone use (%)¶ | 35.0 | 35.1 | 35.4 | 34.1 | 31.8 | 32.4 |
| Mean age at first birth (years) | 22.8 | 22.8 | 22.9 | 22.8 | 22.7 | 23.0 |
| History of breast feeding own children (%) | 32.7 | 30.6 | 29.2 | 30.4 | 30.7 | 33.0 |
| Ever Smoked (%) | 54.1 | 55.1 | 56.0 | 58.6 | 60.5 | 56.6 |
| BMI at age 18 (kg/m2) | 21.2 | 21.1 | 21.5 | 21.9 | 22.5 | 21.2 |
| High socioeconomic status at Age 16 (%)‡ | 26.1 | 27.5 | 26.9 | 24.6 | 19.6 | 21.8 |
†
Proportion of participants on the 1992 questionnaire who indicated that they were born 2 or more weeks premature.
††
Proportion of participants on the 1982 questionnaire who indicated that their mother had received a diagnosis of diabetes
¶
Current post-menopausal hormone use among post-menopausal women
‡
Father’s occupation was manager or professional when the participant was 16 years of age