Characterisation of risk categories and risk factors
| Risk category | Full sample | Pregnancy planning | ||
| N (%) | Total N | N (%) | Total N | |
| Reproductive history | 1080 | 529 | ||
| Any risk factor from category | 678 (62.8) | 318 (60.1) | ||
| Top three from category: | ||||
| 1. Caesarean section | 358 (33.1) | 152 (28.7) | ||
| 2. Miscarriage | 294 (27.2) | 142 (26.8) | ||
| 3.High birth weight | 146 (13.5) | 57 (10.8) | ||
| Sexual health | 1080 | 529 | ||
| Any risk factor from category | 24 (2.2) | 12 (2.3) | ||
| Chronic medical conditions | 1080 | 529 | ||
| Any risk factor from category | 284 (26.3) | 125 (23.6) | ||
| Top three from category: | ||||
| 1. Asthma | 163 (15.1) | 72 (13.6) | ||
| 2. Thyroid disease | 79 (7.3) | 35 (6.6) | ||
| 3. Inflammatory bowel disease | 31 (2.9) | 12 (2.3) | ||
| Medications | 1080 | 529 | ||
| Any risk factor from category | 562 (52.0) | 278 (52.6) | ||
| Prescription | 380 (35.2) | 182 (34.4) | ||
| Over-the-counter | 229 (21.2) | 116 (21.9) | ||
| Complimentary/alternative | 153 (14.2) | 69 (13.0) | ||
| Mental health | ||||
| Any risk factor from category | 134 (12.4) | 70 (13.2) | ||
| Anxiety (GAD-7 >10) | 96 (9.1) | 1055 | 53 (10.2) | 518 |
| Depression (PHQ >10) | 90 (8.5) | 1060 | 48 (9.2) | 520 |
| Both risk factors | 52 (4.9) | 1055 | 31 (6.0) | 518 |
| Tobacco use | 58 (5.4) | 1080 | 26 (4.9) | 529 |
| Alcohol and other substance use | ||||
| Any risk factor from category | 290 (26.9) | 110 (21.1) | ||
| Alcohol use (>1/week) | 228 (22.2) | 1026 | 80 (16.0) | 501 |
| Cannabis use | 86 (8.1) | 1067 | 40 (7.7) | 522 |
| Infectious diseases | 1080 | |||
| Any risk factor from category | 2 (0.02) | 0 (0) | ||
| Nutrition | 418 (40.7) | 1027 | 215 (42.8) | 502 |
| Weight status | 1043 | 505 | ||
| BMI ≥25 | 526 (50.4) | 265 (52.5) | ||
| Overweight (BMI=25–29.9) | 286 (27.4) | 142 (28.1) | ||
| Obese (BMI >29.9) | 240 (23.0) | 123 (24.4) | ||
| Underweight (BMI <20) | 33 (3.0) | 17 (3.4) | ||
| Low physical activity | 434 (43.1) | 1008 | 221 (44.9) | 492 |
| Psychosocial stressors | ||||
| Any risk factor from category | 466 (43.1) | 225 (42.5) | ||
| Loneliness | 336 (32.0) | 1050 | 157 (30.5) | 515 |
| Low income | 152 (14.1) | 1080 | 88 (16.6) | 529 |
| Unemployment | 116 (10.7) | 1080 | 57 (10.8) | 529 |
BMI, body mass index; GAD, Generalized Anxiety Disorder; PHQ, Patient Health Questionnaire.