TABLE 1.

Selected characteristics of the 3 studies¹

	Allison et al (1)	Mokdad et al (2)	Flegal et al (3)
Data sets used as derivation cohorts to estimate hazard ratios
Alameda County study, 1965–1975	✓	✓
Framingham Heart Study, 1948–1980	✓	✓
Tecumseh Community Study, 1959–1985	✓	✓
Cancer Prevention Study I, 1960–1972	✓	✓
Nurses’ Health Study, 1976–1992	✓	✓
NHANES I, 1971–1992	✓	✓	✓
NHANES II, 1976–1992			✓
NHANES III, 1988–2000			✓
Target year for which deaths are estimated
1991	✓
2000		✓	✓
Data sets used to estimate prevalence of BMI in target year for target population
NHANES III (1988–1994)	✓
NHANES 1999–2000		✓
NHANES 1999–2002			✓
Reference BMI category
23 to <25 kg/m2	✓	✓
18.5 to <25 kg/m2			✓
Hazard ratios in derivation cohorts adjusted for
Age, sex, smoking	✓	✓
Age, sex, smoking, alcohol, race-ethnicity group			✓
Attributable fraction in target population adjusted for
No adjustment	✓	✓
Age, sex, smoking, alcohol, race-ethnicity group			✓
Effect modification by age
Not allowed for	✓	✓
Allowed for			✓
NHANES I smoking data
Missing smoking data statistically imputed	✓	✓
No imputed data			✓

¹NHANES, National Health and Nutrition Examination Survey.