Table 1.
Baseline characteristics of 2,820 Danish women and their male partners participating in a prospective cohort study of pregnancy planners, according to female and male age at baseline
| Female age at baseline | Male age at baseline | |||||||
|---|---|---|---|---|---|---|---|---|
|
|
||||||||
| Characteristic | <25 | 25–29 | 30–34 | 35–40 | <25 | 25–29 | 30–34 | 35–39 |
| Number | 466 | 1355 | 791 | 208 | 198 | 1046 | 1048 | 393 |
| Partner’s age, years (mean) | 26.5 | 29.6 | 33.3 | 37.0 | 23.1 | 26.5 | 29.2 | 32.0 |
| Regular cycles (%) | 74.0 | 75.9 | 81.3 | 85.6 | ||||
| Cycle length (mean)a | 28.9 | 28.8 | 28.6 | 28.1 | ||||
| Cycle length <27 days (%)a | 9.6 | 12.9 | 14.0 | 16.9 | ||||
| Cycle length ≥32 days (%)a | 11.0 | 11.6 | 7.8 | 3.4 | ||||
| BMI, kg/m2 (mean) | 24.1 | 23.8 | 23.7 | 24.3 | 25.1 | 25.3 | 25.1 | 25.4 |
| Vigorous physical activity, h/wk (mean) | 1.6 | 1.7 | 1.4 | 1.5 | ||||
| Higher education >4 yrs (%) | 4.7 | 23.5 | 40.5 | 30.3 | ||||
| Parous (%) | 10.1 | 22.3 | 49.3 | 68.3 | ||||
| Current regular smoker, yes (%) | 15.5 | 10.4 | 9.4 | 9.6 | 21.7 | 17.0 | 16.9 | 19.1 |
| Pack-years of ever smoking (mean) | 3.5 | 4.7 | 5.6 | 7.8 | 2.6 | 3.3 | 4.0 | 4.8 |
| Alcohol intake, drinks/wk (mean) | 2.3 | 2.9 | 3.1 | 3.2 | ||||
| Intercourse frequency, ≥4 times/wk (%) | 30.7 | 20.7 | 14.8 | 15.4 | 30.8 | 22.8 | 16.3 | 17.6 |
| Doing something to time intercourse (%) | 40.8 | 40.0 | 42.2 | 49.0 | 43.9 | 41.0 | 39.1 | 43.5 |
| Methods used to time intercourse (%)b | ||||||||
| Basal Body Temperature | 3.0 | 2.0 | 1.9 | 1.4 | 1.5 | 2.7 | 1.6 | 2.0 |
| Cervical mucus | 17.2 | 15.8 | 16.6 | 21.1 | 17.2 | 16.3 | 15.3 | 19.3 |
| LH/ovulation test kit | 13.9 | 12.5 | 14.4 | 14.9 | 15.6 | 14.2 | 11.6 | 14.0 |
| Otherc | 14.6 | 17.5 | 18.1 | 20.7 | 16.7 | 15.8 | 18.1 | 18.8 |
| Last method of contraception (%) | ||||||||
| Barrier methods | 21.9 | 26.3 | 31.7 | 33.7 | 24.7 | 26.8 | 27.9 | 31.3 |
| Hormonal contraceptives | 73.1 | 65.3 | 54.8 | 46.6 | 68.8 | 66.2 | 61.0 | 52.8 |
| Withdrawal, charting, or other | 5.0 | 8.4 | 13.5 | 19.7 | 6.5 | 7.0 | 11.1 | 15.9 |
a
Among women with regular cycles.
b
Categories are not mutually exclusive.
c
Most common response to “other” was “calendar method/counting number of days since LMP.”