Intervention group | Control group | P value | |
---|---|---|---|
Gestational age (weeks) | 34.5 ± 2.1 | 33.4 ± 2.5 | 0.542 |
Ductus arteriosus size (mm) | 2.8 ± 0.5 | 2.9 ± 0.6 | 0.745 |
Pulmonary artery pressure (mmHg) | 43.2 ± 15.4 | 45.5 ± 14.5 | 0.388 |
Weight (kg) | 2.0 ± 0.8 | 2.1 ± 07 | 0.861 |
Height (cm) | 26.3 ± 7.1 | 28.2 ± 6.2 | 0.402 |
Parents’ educational level | |||
Below senior high school | 6 | 7 | |
High school | 15 | 16 | |
Junior college | 18 | 17 | 0.655 |
Bachelor degree or above | 8 | 7 | |
Living environment | |||
Rural areas | 30 | 32 | 0.663 |
City | 17 | 15 |