Further
adjustment for smoking and LTPA attenuated
the death rate for underweight adults (HR =
1.88; 95% CI = 1.43, 2.46), strengthened the
association for grade II obesity adults (HR =
1.41; 95% CI = 1.09, 1.82) but had nearly no
effect on the death rate for extremely or grade
III obese adults (HR = 1.42; 95% CI = 1.12,
1.81).