Table 1.
Characteristics of the Study Sample. The Aberdeen Maternity and Neonatal Databank-Study 1950-2015.
| Study Generation | Grandmaternal | Maternal | Child | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Characteristic | Data Available (No.) | No. | % | Mean (SD) | Data Available (No.) | No. | % | Mean (SD) | Data Available (No.) | No. | % | Mean (SD) |
| Maternal Prenatal Body Mass Indexa | 1,449 | 23.3 (3.7) | 1,454 | 23.9 (3.7) | 1,454 | 25.2 (5.2) | ||||||
| Maternal Height (cm) | 1,457 | 157.8 (5.9) | 1,457 | 159.4 (6.0) | 1,457 | 163.4 (6.4) | ||||||
| Maternal Prenatal Weight (kg) | 1,449 | 58.1 (9.6) | 1,454 | 60.8 (10.4) | 1,454 | 67.4 (14.8) | ||||||
| Gestation Weight Measured | 1,449 | 1,454 | 1,454 | |||||||||
| <20 Weeks | 960 | 66.3 | 999 | 68.7 | 1365 | 93.9 | ||||||
| 20-24 Weeks | 273 | 18.8 | 352 | 24.2 | 40 | 2.8 | ||||||
| 25-29 Weeks | 137 | 9.5 | 62 | 4.3 | 20 | 1.4 | ||||||
| 30≥ Weeks | 79 | 5.5 | 41 | 2.8 | 29 | 2.0 | ||||||
| Maternal Smoking During Pregnancy | 162 | 1010 | 1,447 | |||||||||
| Never Smoked | 105 | 64.8 | 316 | 31.3 | 870 | 60.1 | ||||||
| Ex-Smoker | 0 | 0 | 21 | 2.1 | 158 | 10.9 | ||||||
| Smoked Throughout Pregnancy | 57 | 35.2 | 673 | 66.6 | 419 | 29.0 | ||||||
| Year of Delivery | 1,457 | 1,957(5) | 1,457 | 1,981(6) | 1,457 | 2,005(6) | ||||||
| Maternal Age at Delivery (years) | 1,455 | 25.3 (5.2) | 1,457 | 23.2 (4.2) | 1,457 | 23.9 (5.1) | ||||||
| Parity | 1,457 | 1,457 | ||||||||||
| Primiparous | 628 | 43.1 | 899 | 61.7 | 1,382 | 94.9 | ||||||
| Multiparous | 829 | 56.9 | 558 | 38.3 | 75 | 5.1 | ||||||
| Labour Type | 1,457 | 1,457 | 1,457 | |||||||||
| Elective Caesarean Section | 18 | 1.2 | 55 | 3.8 | 62 | 4.3 | ||||||
| Induced Delivery | 282 | 19.4 | 442 | 30.3 | 467 | 32.1 | ||||||
| Spontaneous | 1,157 | 79.4 | 960 | 65.9 | 928 | 63.7 | ||||||
| Maternal Hypertensive Disorders in Pregnancy | 1,457 | 1,457 | 1,457 | |||||||||
| Gestational Hypertension | 198 | 13.6 | 340 | 23.3 | 166 | 11.4 | ||||||
| Preeclampsia | 48 | 3.3 | 76 | 5.2 | 90 | 6.2 | ||||||
| Essential Hypertension | 0 | 0.0 | 4 | 0.3 | 5 | 0.3 | ||||||
| Normotension | 1,211 | 83.1 | 1,037 | 71.2 | 1,196 | 82.1 | ||||||
| Maternal Pre-Existing or Gestational Diabetes | 1,457 | 1,457 | 1,457 | |||||||||
| Yes | 0 | 0.0 | 6 | 0.4 | 17 | 1,2 | ||||||
| No | 1,457 | 100.0 | 1,451 | 99.6 | 1,440 | 98.8 | ||||||
| Socioeconomic Deprivation Level | 1,055 | 1392 | 1,423 | |||||||||
| Low (=1) | 1,013 | 96.0 | 380 | 27.3 | 204 | 14.3 | ||||||
| Intermediate (2-3) | 42 | 4.0 | 337 | 24.2 | 531 | 37.3 | ||||||
| High (≥4) | 675 | 48.5 | 688 | 48.3 | ||||||||
| Child Sex | 1,457 | 1,457 | 1,457 | |||||||||
| Girls | 1,457 | 100.0 | 1,457 | 100.0 | 721 | 49.5 | ||||||
| Boys | 0 | 0.0 | 0 | 0.0 | 736 | 50.5 | ||||||
| Child Gestational Age (weeks) | 1,382 | 40.4 (1.7) | 1,457 | 39.6 (1.8) | 1,457 | 39.4 (1.9) | ||||||
| Child Birth Weight (grams) | 1,457 | 3,240.7 (460.2) | 1,457 | 3,198.4 (494.8) | 1,457 | 3,315.8 (562.5) | ||||||
| Child Birth Weight SD score | 1,280 | -0.04 (0.96) | 1,429 | -0.10 (1.00) | 1,426 | -0.07 (1.01) | ||||||
| Small For Gestational Age Birth | 25 | 2.0 | 39 | 2.7 | 39 | 2.7 | ||||||
| Appropriate For Gestational Age Birth | 1226 | 95.8 | 1,361 | 95.2 | 1,353 | 94.9 | ||||||
| Large For Gestational Age Birth | 29 | 2.3 | 29 | 2.0 | 34 | 2.4 | ||||||
a
Body mass index=weight (kg)/height (metres)2. Abbreviations: kg=kilograms; cm=centimeters; m=metres; SD=standard deviation