Table 1.
Background and demographics among those who answered the baseline questionnaire and comparison between those who answered and did not answer the follow-up questionnaire.
| Answer baseline n = 1946 | Answer baseline and follow-up n = 1204 | Answer baseline and not follow-up n = 742 | P | |
|---|---|---|---|---|
| Age, median year (interquartile range) | 25 (22, 31) | 26 (22, 31) | 24 (3.4) | 0.003 |
| BMI, n (%) | ||||
| Underweight (<18.5) | 14 (0.7) | 26 (2.2) | 25 (2.3) | 0.263 |
| Normal weight (18.5–24.99) | 1198 (64.3) | 763 (65.5) | 435 (61.1) | |
| Overweight (25–29.99) | 430 (22.0) | 259 (22.3) | 171 (24.0) | |
| Obese class I (30–34.99) | 138 (7.1) | 80 (6.9) | 58 (8.1) | |
| Obese class II (>35) | 47 (2.4) | 36 (3.1) | 24 (3.4) | |
| Education, n (%) | ||||
| Non-completed education (<9 years) | 14 (0.7) | 4 (0.3) | 10 (1.3) | <0.001 |
| Elementary school (9 years) | 82 (4.2) | 33 (2.8) | 49 (6.6) | |
| High school (12 years) | 1145 (58.9) | 678 (56.6) | 467 (62.7) | |
| Professional education (non-academic) | 159 (21.3) | 99 (8.3) | 60 (8.1) | |
| College/university | 543 (27.8) | 384 (32.1) | 159 (8.1) | |
| Main occupation, n (%) | ||||
| Working | 1105 (56.9) | 644 (53.8) | 461 (61.8) | <0.001 |
| Student | 535 (27.5) | 361 (30.2) | 174 (23.3) | |
| Parental leave | 171 (8.8) | 123 (10.3) | 48 (6.4) | |
| Unemployed | 66 (3.4) | 32 (2.7) | 34 (4.6) | |
| Sick leave | 52 (2.7) | 28 (2.3) | 24 (3.2) | |
| Other | 14 (0.7) | 9 (0.8) | 5 (0.7) | |
| Country of birth, n (%) | ||||
| Sweden | 1798 (92.9) | 1129 (94.7) | 669 (90.0) | 0.002 |
| Other Nordic country | 14 (0.7) | 6 (0.5) | 8 (1.1) | |
| Other European country | 50 (2.6) | 25 (2.1) | 25 (3.4) | |
| Outside Europe | 74 (3.8) | 33 (2.8) | 41 (5.5) | |
| Sexual orientation, n (%) | ||||
| Heterosexual | 1823 (94.4) | 1135 (95.1) | 688 (93.2) | 0.109 |
| Bisexual | 80 (4.1) | 47 (3.9) | 33 (4.5) | |
| Homosexual | 1 (0.1) | 1 (0.1) | 0 (0.0) | |
| Do not know/unsure | 21 (1.1) | 9 (0.8) | 12 (1.6) | |
| Other | 7 (0.4) | 2 (0.2) | 5 (0.7)) | |
| Stable relationship, n (%) | 1476 (76.3) | 927 (77.7) | 549 (74.0) | 0.062 |
| Reproduction, n (%) | ||||
| Had tried to get pregnant | 652 (33.7) | 412 (34.5) | 240 (32.4) | 0.348 |
| Had been pregnant | 881 (45.4) | 512 (42.8) | 369 (49.6) | 0.003 |
| Had given birth | 656 (75.5) | 413 (81.5) | 243 (67.1) | <0.001 |
| Experience of abortion | 280 (32.3) | 135 (26.7) | 145 (40.1) | <0.001 |
| Experience of miscarriage | 112 (12.9) | 78 (15.4) | 34 (9.4) | 0.009 |
| Smoking, n (%) | ||||
| Smoking daily | 199 (10.2) | 102 (8.6) | 97 (13.1) | <0.001 |
| Smoking, but not daily | 221 (11.5) | 108 (9.1) | 113 (15.3) | |
| Former smoker | 429 (22.0) | 276 (23.2) | 153 (20.7) | |
| Never smoked | 1077 (55.9) | 702 (59.1) | 375 (50.8) | |
| Swedish snuff, n (%) | ||||
| Snuff daily | 126 (6.4) | 65 (5.5) | 61 (8.3) | 0.013 |
| Use snuff, but not daily | 81 (4.2) | 47 (4.0) | 34 (4.6) | |
| Former user of snuff | 157 (8.1) | 93 (7.8) | 64 (8.7) | |
| Never used snuff | 1563 (81.1) | 984 (82.8) | 579 (78.5) | |
| Drinking alcohol, 4 standard glasses or more at the same time, n (%)a | ||||
| Daily | 1 (0.1) | 1 (0.1) | 0 (0) | 0.073 |
| Once/week | 94 (4.8) | 54 (4.5) | 40 (5.5) | |
| Once/month | 495 (25.8) | 290 (24.3) | 205 (28.0) | |
| Less than once/month | 972 (49.7) | 618 (51.9) | 354 (48.4) | |
| Never | 360 (18.7) | 228 (19.1) | 132 (18.1) |
a
One standard glass is: Beer (<3.5%) 50 cL; beer (>3.5%) 33 cL; wine (8%–15%) 12–15 cL; wine (15%–22%) 8 cL; or liquor 4 cL.