Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Demographic characteristics in three groups.
| Ear pad group | Silent group | Control group | * P value | ||||
| Mean | SD | Mean | SD | Mean | SD | ||
|
| |||||||
| Birth weight | 1529.3 | 503.9 | 1631 | 558.9 | 1669.3 | 533.3 | 0.3 |
| Gestational age (weeks) | 31.4 | 2.8 | 31.9 | 1.7 | 31.8 | 2.6 | 0.7 |
| Postnatal age (days) | 7.1 | 4.2 | 5.9 | 2.5 | 5.03 | 3.5 | 0.2 |
| APGAR score (first min) | 7.4 | 0.7 | 8.1 | 0.7 | 7.5 | 0.8 | 0.5 |
| APGAR score (fifth min) | 8.5 | 0.8 | 8.9 | 1 | 8.6 | 0.9 | 0.6 |
*One-way ANOVA.
