Table 4.

Multivariable Models for Change in Anthropometric Z-scores from Birth to Age 6 Years.^*

Weight-for-age Z-score (n=261, adjusted R2=0.34)
Variable	Estimate	Standard Error	P-value	Reliability (%)
Birth weight, kg	−0.001	0.0001	<0.001	82
Cumulative length of stay: all admissions (days)			0.001	64
≤30	0.914	0.229
31–44	0.351	0.170
45–67	0.242	0.179
>67	Reference
Race/ethnicity			0.02	56
Hispanic	−0.229	0.459
White non-Hispanic	−0.471	0.440
Black non-Hispanic	0.193	0.479
Other non-Hispanic	Reference
Height-for-age Z-score (n=259, adjusted R2=0.20)
Variable	Estimate	Standard Error	P-value	Reliability (%)
Birth weight, kg	−0.002	0.0002	<0.001	85
Body Mass Index-for-age Z-score (n=246, adjusted R2=0.07)
Variable	Estimate	Standard Error	P-value	Reliability (%)
Hollingshead score			0.014	69
<27.0	0.296	0.323
27.0–43.0	0.158	0.302
43.0–54.5	0.921	0.312
>54.5	reference
Tube feeding--any time			0.003	59
Yes	−0.700	0.232
No	Reference
Sex			0.040	54
Male	0.457	0.221
Female	Reference

^*Results were similar with and without center included as a potential predictor in the model. Only those without center are presented.