Table 1.
Characteristics of the total study sample and the analytical sample.
| Total study sample (n = 947) % (n) |
Analytical study sample1 (n = 868) % (n) |
|
|---|---|---|
| Nationality | ||
| Kuwaiti | 62.3 (590) | 62.3 (541) |
| Non-Kuwaiti | 37.7 (357) | 37.3 (327) |
| Age (years) | ||
| <25 | 16.6 (157) | 17.6 (152) |
| 25 – 29 | 30.0 (283) | 30.3 (262) |
| 30 – 34 | 29.4 (277) | 29.2 (253) |
| ≥35 | 24.0 (226) | 22.9 (198) |
| Missing, n | 4 | 3 |
| Education level | ||
| ≤Middle school | 5.7 (54) | 5.6 (48) |
| High School | 17.6 (166) | 16.3 (141) |
| ≥College or university | 76.7 (723) | 78.1 (676) |
| Missing (n) | 4 | 3 |
| Prepregnancy BMI (kg/m2) | ||
| Normal (<25.0) | 44.9 (365) | 45.7 (343) |
| Overweight (25.0 – 29.9) | 33.2 (270) | 33.2 (249) |
| Obese (≥30.0) | 21.9 (178) | 21.1 (159) |
| Missing (n) | 134 | 117 |
| Family history of GDM2 | ||
| Yes | 31.0 (291) | 28.9 (250) |
| No | 79.0 (649) | 71.1 (614) |
| Missing (n) | 7 | 4 |
| Family history of DM3 | ||
| Yes | 59.7 (563) | 58.1 (503) |
| No | 40.3 (379) | 41.9 (362) |
| Missing (n) | 5 | 3 |
| Stillbirth and/or miscarriage | ||
| Yes | 30.7 (286) | 29.8 (255) |
| No | 69.3 (645) | 70.2 (601) |
| Missing (n) | 16 | 12 |
GDM: gestational diabetes mellitus; DM: diabetes mellitus; BMI: body mass index. 1Analytical study sample is restricted to participants with information on GDM status. 2Refers to history of GDM in mother and/or sister of the participant. 3Refers to history of DM in mother, father, and/or sibling of the participant.