Table 1.
Characterization of macrosomia and control groups and the representativeness of the control.
| Variables | Total Subjects | Control | ||||
|---|---|---|---|---|---|---|
| Macrosomia (N = 405) (A) |
Normal Weight Newborns (N = 3855) (B) |
p | Not Selected (N = 3450) (C) |
Selected (N = 405) (D) |
p | |
| Age (years old) | 30.2 ± 4.2 | 28.1 ± 3.7 | <0.001 | 28.9 ± 3.8 | 29.2 ± 4.1 | 0.251 |
| Pre-pregnancy BMI (Kg/m2) | 23.6 ± 4.0 | 22.3 ± 3.2 | <0.001 | 21.9 ± 3.1 | 22.1 ± 3.3 | 0.236 |
| Gestational Age (week) | 40.1 ± 0.9 | 39.8 ± 1.1 | 0.285 | 39.8 ± 1.1 | 39.9 ± 0.8 | 0.883 |
| Birth Weight (g) | 4201.5 ± 249.1 | 3325.9 ± 340.1 | <0.001 | 3331.1 ± 349.9 | 3283.5 ± 339.9 | 0.532 |
| Number of pregnancies N (%) | <0.001 | 0.295 | ||||
| 1 | 153 (37.8) | 2209 (57.3) | 1979 (57.4) | 230 (56.7) | ||
| 2 | 149 (36.8) | 1121 (29.1) | 1002 (29.0) | 119 (29.3) | ||
| ≥3 | 103(25.4) | 525(13.6) | 469(13.6) | 56 (13.8) | ||
| Parity N (%) | <0.001 | 0.347 | ||||
| 1 | 291 (71.9) | 3577 (92.8) | 3198 (92.7) | 379 (93.5) | ||
| ≥2 | 114 (28.1) | 278 (7.2) | 252 (7.3) | 26 (6.4) | ||
| Interspinal Diameter (cm) | 25.4 ± 1.2 | 25.6 ± 1.9 | 0.374 | 25.5 ± 1.8 | 25.3 ± 1.7 | 0.115 |
| Intercristal Diameter (cm) | 28.2 ± 1.3 | 28.0 ± 2.2 | 0.005 | 28.1 ± 1.8 | 28.0 ± 2.4 | 0.236 |
| Sacral External Diameter (cm) | 19.8 ± 0.6 | 20.1 ± 1.4 | 0.050 | 19.9 ± 1.2 | 20.0 ± 1.2 | 0.434 |
| Transverse Outlet (cm) | 8.5 ± 0.2 | 8.5 ± 0.5 | 0.971 | 8.5 ± 0.3 | 8.5 ± 0.4 | 0.867 |
BMI: body mass index.