Characteristics of subjects completing first and third trimester polysomnography (n=105)
| Characteristic | Subjects completing both PSGs |
|---|---|
| Age, years (SD) | 26.7 (7.2) |
| Race, n (%) | |
| African–American | 79 (75.2) |
| Caucasian | 22 (21.0) |
| Other | 4 (3.8) |
| Baseline BMI, kg/m2 (SD) | 33.4 (6.4) |
| Normal, n (%) | 30 (28.6) |
| Overweight, n (%) | 25 (23.8) |
| Class I obesity, n (%) | 25 (23.8) |
| Class II–III obesity, n (%) | 25 (23.8) |
| Gestational weight gain, kg (SD) | 8.9 (5.5) |
| 1st trimester neck circumference, cm (SD) | 35.7 (3.0) |
| 1st trimester AHI, events/hour (Median) | 2.07 (1.1) |
| Nulliparous, n (%) | 32 (30.5) |
| Singleton gestation, n (%) | 102 (97) |
| Chronic hypertension, n (%) | 5 (4.76) |
| History of hypertensive disorder of pregnancy, n (%) | 9 (8.6) |
AHI, Apnoea-Hypopnoea Index; BMI, Body Mass Index; PSG, polysomnography.