Table 5

Illness severity by 250 gram birthweight increments. Data for infants <500 grams are not provided due to small numbers.

Birthweight 500–749 grams

Birthweight 750–999 grams

Birthweight 1000–1249 grams

Birthweight 1250–1500 grams

Birthweight p


T4 (μg/dl)

Cohort 1 1993–1996

4.5 ± 2.3

6.1 ± 3.1

8.0 ± 3.5

9.8 ± 3.6

<.01

Cohort 2 1996–1999

4.3 ± 3.3

5.8 ± 2.9

7.4 ± 2.9

8.9 ± 3.2

<.01

Cohort 3 1999–2002

3.6 ± 2.3

5.0 ± 2.9

6.9 ± 3.7

8.3 ± 3.7

<.01

Cohort, p

.20

.03

.04

.03

SNAP

Cohort 2 1996–1999

17.1 ± 6.7

13.6 ± 7.0

10.1 ± 5.0

8.0 ± 4.6

<.01

Cohort 3 1999–2002

22.0 ± 9.3

15.8 ± 7.6

11.4 ± 5.4

9.3 ± 5.7

<.01

Cohort, p

.01

.03

.04

.05


Paul et al. BMC Pediatrics 2006 6:2   doi:10.1186/1471-2431-6-2

Open Data