Table 1.
Demographics and distribution of ultrasound findings
| Maternal characteristic | Total (n = 286) | Ultrasound finding categories |
||||
|---|---|---|---|---|---|---|
| Normala (n = 146 [51.0%]) | Indeterminateb (n = 116 [40.5%]) | Pc | Major abnormalityd (n = 24 [8.0%]) | Pc | ||
| Participation | ||||||
| Pretest only | 68 (23.8) | 26 (17.8) | 32 (27.6) | 0.058 | 10 (41.7) | 0.010 |
| Pretest and posttest | 218 (76.2) | 120 (82.2) | 84 (72.4) | 14 (58.3) | ||
| Trimester | ||||||
| 1st | 94 (32.9) | 65 (44.5) | 25 (21.6) | <0.001 | 4 (16.7) | < 0.001 |
| 2nd | 131 (45.8) | 62 (42.5) | 59 (50.9) | 10 (41.7) | ||
| 3rd | 61 (21.3) | 19 (13.0) | 32 (27.6) | 10 (41.7) | ||
| Age | ||||||
| < = 24 | 54 (18.9) | 30 (20.6) | 19 (16.4) | 0.691 | 5 (20.8) | 0.250 |
| 25–33 | 152 (53.2) | 78 (53.4) | 65 (56.0) | 9 (37.5) | ||
| 34+ | 80 (28.0) | 38 (26.0) | 32 (27.6) | 10 (41.7) | ||
| Race | ||||||
| Black | 113 (39.5) | 58 (39.7) | 44 (37.9) | 0.450 | 11 (45.8) | 0.640 |
| White | 141 (49.3) | 74 (50.7) | 55 (47.4) | 12 (50.0) | ||
| Other | 32 (11.2) | 14 (9.6) | 17 (14.7) | 1 (4.2) | ||
| Psychiatric history | ||||||
| None | 144 (52.4) | 78 (54.9) | 53 (48.6) | 0.373 | 13 (54.2) | 0.710 |
| Anxiety | 50 (18.2) | 21 (14.8) | 24 (22.0) | 5 (20.8) | ||
| Depression | 24 (8.7) | 15 (10.6) | 8 (7.3) | 1 (4.2) | ||
| Anxiety + depression | 57 (20.7) | 28 (19.7) | 24 (22.0) | 5 (20.8) | ||
| Gravidity | ||||||
| Multigravida | 159 (59.6) | 80 (57.6) | 61 (58.7) | 0.864 | 18 (75.0) | 0.110 |
| Primigravida | 108 (40.5) | 59 (42.5) | 43 (41.4) | 6 (25.0) | ||
| Body mass index | ||||||
| < 30 | 200 (69.9) | 111 (76.0) | 74 (63.8) | 0.031 | 15 (62.5) | 0.160 |
| ≥ 30 | 86 (30.1) | 35 (24.0) | 42 (36.2) | 9 (37.5) | ||
| Infertility | ||||||
| No | 211 (79.3) | 110 (79.7) | 84 (80.0) | 0.956 | 17 (73.9) | 0.530 |
| Yes | 55 (20.7) | 28 (20.3) | 21 (20.0) | 6 (26.1) | ||
Data are N(%) unless otherwise specified; % in columns may not add to exactly 100% due to rounding
Reference group
Indeterminate = incomplete or minor abnormalities (including anatomic variants, isolated soft markers, e.g., isolated choroid plexus cyst), which are of uncertain clinical import
P values obtained from chi-squared tests comparing distribution of indeterminate findings and major abnormalities to normal findings with respect to various maternal characteristics
Major abnormality = ultrasound finding clinically significant for the fetus/pregnancy (including findings with a good prognosis, e.g. transposition of the great arteries, poor prognosis, e.g. anencephaly, or shortened cervix (< 25 mm)