Table 1.
Participant characteristics by birthweight category (N=950*)
| Birthweight category (data provided as percentage by category)
|
||||
|---|---|---|---|---|
| <750 g | 750–<1000 g | 1000–<1250 g | 1250–<1500 g | |
| Percentage by birthweight category | 14 | 24 | 29 | 32 |
| Variable (% by category, columns add to 100%) | ||||
| Gender | ||||
| Male (50%) | 49 | 56 | 43 | 52 |
| Female (50%) | 51 | 44 | 57 | 48 |
| p Value (χ2) | 0.02 | |||
| Gestation | ||||
| Extremely preterm (22 to <28 weeks) (33%) | 82 | 58 | 21 | 7 |
| Very preterm (28 to <32 weeks) (50%) | 13 | 36 | 58 | 56 |
| Moderate-to-late preterm (32–<37 weeks) (17%) | 5 | 5 | 20 | 31 |
| Term | 0 | 1 | 1 | 6 |
| p Value (χ2) | <0.0001 | |||
| Socio-economic status | ||||
| 1. High (22%) | 24 | 17 | 23 | 24 |
| 2. Medium high (22%) | 23 | 22 | 22 | 23 |
| 3. Medium (22%) | 21 | 28 | 19 | 20 |
| 4. Medium low (17%) | 15 | 17 | 19 | 16 |
| 5. Low (17%) | 17 | 16 | 17 | 18 |
| p Value (χ2) | 0.6 | |||
| Parental education | ||||
| 1. Less than high school (17%) | 15 | 15 | 15 | 17 |
| 2. High school (28%) | 29 | 21 | 27 | 31 |
| 3. Some college/vocational (28%) | 31 | 36 | 30 | 22 |
| 4. College degree (17%) | 17 | 18 | 15 | 17 |
| 5. Graduate or doctorate (11%) | 8 | 10 | 13 | 12 |
| p Value (χ2) | 0.1 | |||
| Hospital stay | ||||
| 1–15 days | 1 | 2 | 4 | 6 |
| 15–30 days | 0 | 1 | 14 | 40 |
| 30–60 days | 7 | 32 | 49 | 42 |
| >60 days | 92 | 65 | 33 | 12 |
| <0.0001 | ||||
| Days on ventilator | ||||
| 0 days | 4 | 10 | 29 | 43 |
| 1–15 days | 16 | 34 | 40 | 39 |
| 15–30 days | 13 | 23 | 16 | 7 |
| 30–60 days | 33 | 22 | 11 | 7 |
| >60 days | 34 | 12 | 4 | 4 |
| <0.0001 | ||||
*
N rounded to the nearest 50 in compliance with National Center for Education Statistics (NCES) guidelines.
NS, not significant (p>0.05).