Table 2.

Tobit Models for ln(CRP): NHANES 1999–2004, ages 3–16 years

	Model 1		Model 2		Model 3
	Coefficient	P-value	Coefficient	P-value	Coefficient	P-value
Physical Risk Factors
Age	–0.003	0.011	0.002	0.053	–0.002	0.019
BMI-for-age	0.220	<0.001			0.206	<0.001
Tricep skinfold measure	0.037	<0.001			0.042	<0.001
Subscapular skinfold measure	0.062	<0.001			0.058	<0.001
Recently sick	0.605	<0.001			0.606	<0.001
Low birth weight	0.000	0.999			–0.017	0.909
Household smoker	–0.021	0.791			0.039	0.644
ln(Cotinine)	0.035	0.140			0.054	0.026
White blood cell count	0.153	<0.001			0.156	<0.001
Infectious burden factor score	0.198	0.032			0.055	0.583
Social Factors
Male gender	0.111	0.104	–0.131	0.086	0.121	0.069
Race: black			0.082	0.413	0.251	0.005
Race: Mexican American			0.609	<0.001	0.516	<0.001
Race: Other			0.341	0.020	0.244	0.070
Family income: Quartile 1			0.242	0.025	–0.034	0.786
Family income: Quartile 2			0.320	0.009	0.013	0.896
Family income: Quartile 3			0.158	0.228	–0.031	0.793
Parental education: Finished high school			0.103	0.363	0.124	0.128
Parental education: Beyond high school			–0.092	0.488	0.051	0.633
Foreign-born			–0.145	0.203	0.001	0.989
Household size			–0.024	0.409	0.047	0.042