Table 1.
Age-standardized baseline (1993) demographic characteristics, lifestyle factors, health conditions, and medical histories according to pregnancy loss reported either at baseline or during follow-up among 95 465 ever-gravid women in the Nurses’ Health Study II
| Baseline characteristics | History of PL reported either at baseline or during follow-up |
|
|---|---|---|
| No | Yes | |
| No. | 71 034 | 24 431 |
| Age,a years | 38.9 (4.64) | 38.38 (4.63) |
| Total physical activity, h/week | 2.75 (4.06) | 2.77 (3.97) |
| AHEI-2010 dietary score | 47.56 (10.66) | 48.01 (10.72) |
| Alcohol, g/day | 3.05 (6.01) | 2.96 (5.67) |
| Gravidity | 2.32 (1.21) | 3.38 (1.69) |
| History of induced abortion | 15 | 17 |
| History of infertility | 19 | 30 |
| Premenopausal | 86 | 93 |
| Parous | 89 | 87 |
| History of gestational diabetes | 5 | 6 |
| History of hypertensive disorders of pregnancy | 13 | 15 |
| Ever or currently married | 96 | 97 |
| Aspirin useb | 7 | 8 |
| Parental history of myocardial infarction or stroke | 26 | 27 |
| BMI at age 18 years, kg/m2 | 21.06 (3.02) | 21.05 (3.08) |
| Current BMI | ||
| <25 kg/m2 | 62 | 63 |
| 25–29.9 kg/m2 | 23 | 22 |
| ≥30 kg/m2 | 15 | 15 |
| Smoking status | ||
| Never | 65 | 65 |
| Past | 24 | 24 |
| Current | 11 | 11 |
| Race/ethnicity | ||
| Non-Hispanic White | 92 | 93 |
| Non-Hispanic Black | 2 | 1 |
| Hispanic | 2 | 2 |
| Other | 4 | 4 |
Values are given as mean (standard deviation) or percentages and are standardized to the age distribution of the study population.
PL, pregnancy loss.
a
Value is not age-adjusted.
b
Aspirin or aspirin-containing products used regularly at least once per week in the past 2 years.