Table I.
Baseline characteristics of 2679 males, by level of alcohol intake in standard servings/week.
| Characteristics | Total | SNARTFORAELDRE (N = 662) | PRESTO (N = 2017) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| None a | 1–5 | 6–13 | ≥14 | None a | 1–5 | 6–13 | ≥14 | ||
| No. of men (%) | 2679 | 73 (11.0) | 303 (45.8) | 235 (35.5) | 51 (7.7) | 411 (20.4) | 712 (35.3) | 614 (30.4) | 280 (13.9) |
| Age, median years | 31 | 30 | 30 | 31 | 31 | 30 | 31 | 31 | 32 |
| Partner’s age, median years | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 30 | 29.5 |
| Partner’s median alcohol intake, servings/week (IQR) | 2 (0–4) | 0 (0–2) | 1 (0–3) | 2.5 (1–4.5) | 4 (1–7) | 0 (0–1) | 1 (0–3) | 3 (2–5) | 5 (2–8.5) |
| Educational level <16 years, N (%) | 841 (31.4) | 17 (23.3) | 90 (29.7) | 60 (25.5) | 13 (25.5) | 182 (44.3) | 234 (32.9) | 141 (23.0) | 104 (37.1) |
| Median hours per week of employment | 40 | 37 | 37 | 37 | 37 | 40 | 40 | 42 | 41.5 |
| Household income (SF/PRESTO) <24 999 DKK monthly/<50 000 USD annual, N (%) |
444 (16.6) | 15 (20.5) | 47 (15.5) | 25 (10.6) | 8 (15.7) | 117 (28.5) | 127 (17.8) | 63 (10.3) | 42 (15.0) |
| BMI, median kg/m2 | 26.2 | 25.2 | 24.7 | 24.8 | 24.7 | 27.5 | 27.2 | 26.1 | 27.1 |
| Physical activity, median MET hours/week | 29 | 33 | 37.2 | 33 | 31.1 | 22.8 | 28.4 | 30.4 | 26.9 |
| Previously fathered a child, N (%) | 1170 (43.7) | 42 (57.5) | 107 (35.3) | 83 (35.3) | 21 (41.2) | 216 (52.6) | 322 (45.2) | 252 (41.0) | 127 (45.4) |
| Frequency of intercourse ≥2 times/week, N (%) | 1664 (62.1) | 42 (57.5) | 201 (66.3) | 148 (63.0) | 31 (60.8) | 242 (58.9) | 444 (62.4) | 378 (61.6) | 178 (63.6) |
| Timing of intercourseb, N (%) | 2044 (76.3) | 55 (75.3) | 227 (74.9) | 175 (74.5) | 32 (62.7) | 311 (75.7) | 539 (75.7) | 490 (79.8) | 215 (76.8) |
| Attempt time >2 months at study entry, N (%) | 825 (30.8) | 31 (42.5) | 103 (34.0) | 72 (30.6) | 14 (27.5) | 143 (34.8) | 213 (29.9) | 171 (27.9) | 78 (27.9) |
| Regular smoking, N (%) | 182 (6.8) | * | 18 (5.9) | 17 (7.2) | * | 29 (7.1) | 32 (4.5) | 33 (5.4) | 45 (16.1) |
| Multivitamin use, N (%) | 878 (32.8) | 25 (34.2) | 87 (28.7) | 67 (28.5) | 14 (27.5) | 138 (33.6) | 234 (32.9) | 213 (34.7) | 100 (35.7) |
| Softdrinksc >1 serving/week, N (%) | 1371 (51.2) | 28 (38.4) | 83 (27.4) | 77 (32.8) | 24 (47.1) | 269 (65.5) | 406 (57.0) | 311 (50.7) | 173 (61.8) |
| Caffeine consumption >150 mg/day, N (%) | 1397 (52.1) | 27 (37.0) | 181 (59.7) | 155 (66.0) | 43 (84.3) | 129 (31.4) | 327 (45.9) | 350 (57.0) | 185 (66.1) |
| History of sexually transmitted infection and/or infection in male reproductive organs, N (%) | 353 (13.2) | 24 (32.9) | 83 (27.4) | 77 (32.8) | 12 (23.5) | 27 (6.6) | 47 (6.6) | 58 (9.4) | 25 (8.9) |
| Asthma and/or hayfever, N (%) | 523 (19.5) | 17 (23.3) | 81 (26.7) | 56 (23.8) | 9 (17.6) | 67 (16.3) | 127 (17.8) | 125 (20.4) | 41 (14.6) |
| Depression and/or anxiety, N (%) | 380 (14.2) | * | 25 (8.3) | 19 (8.1) | * | 67 (16.3) | 109 (15.3) | 92 (15.0) | 50 (17.9) |
| Non-Hispanic white, N (%) | - | - | - | - | - | 344 (83.7) | 582 (81.7) | 542 (88.3) | 257 (91.8) |
a
aIncludes drinkers who reported drinking <1 drink per week.
b
bHaving intercourse at the time of highest probability of conception.
c
cIncludes sugar-sweetened soda intake and juice.
*Low numbers. The precise numbers cannot be shown, according to the guidelines of Statistics Denmark.
SnartForaeldre: Danish study, PRESTO: North American Pregnancy Study Online, MET: metabolic equivalents, IQR = interquartile range.