. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: Int J Hyg Environ Health. 2013 Mar 9;216(6):703–709. doi: 10.1016/j.ijheh.2013.01.005

Table 1.

NHANES 2003–2004 sample selection.

2003–2004

(N=10122)

Included in Lab C (aged 12 years or older)

(N=2285)

ALT measured

(N=2121)

Exclusions (possibly overlapping)

Missing BMI: 45

Missing PIR: 100

Missing Alcohol Information: 285

Positive Hepatitis B Surface Antigen: 9

Positive Hepatitis C Antibody +: 35

Elevated Transferrin Saturation: 16

High Alcohol Intake: 562

Self-reported Liver Disease: 56

ALT >99^th percentile (81 U/L): 21

Final Sample: N= 1345

Test sample: N=672, Validation Sample: N=673