Table 3: Cox Regression Models Predicting Mortality at 20-year followup by BMI, and age, controlling for smoking status (Ever versus Never).

Full sampleAge groups
75–84 year olds85–94 years old
CD and NH residentsCDCD and NH residentsCDCD and NH residentsCD
HRCIHRCIHRCIHRCIHRCIHRCI

Background
Age 1.055–1.082 1.053–1.081 1.047–1.108 1.045–1.108 1.025–1.100 1.025–1.107
Gender ( ) 1.104–1.453 1.092–1.465 1.195–1.709 1.202–1.7461.087.871–1.3571.0510.823–1.342

Origin
 East.8490.715–1.0080.8670.723–1.0400.9600.767–1.2010.993.788–1.252 0.559–0.955 0.533–0.958
 West1.0300.887–1.1971.0420.887–1.2241.0240.846–1.2401.033.844–1.2641.0280.805–1.3131.0330.786–1.358
Years of education0.9940.982–1.0070.9960.982–1.0090.9980.981–1.0150.999.981–1.0170.9920.974–1.0110.9930.972–1.015
Additional income0.9400.829–1.0700.9320.811–1.071 0.711–1.003 0.717–1.0261.0400.845–1.2790.9930.791–1.247
Had children 0.570–0.872 0.538–0.869 .504–.867 0.468–0.8440.7910.554–1.1300.7800.506–1.204
Smoking status
(1= ever)
1.1060.969–1.2621.1030.959–1.269 0.974–1.3641.1510.966–1.3711.0150.816–1.2630.9930.781–1.263

BMI
Obese (>30)1.1220.934–1.3471.096.902–1.332 1.022–1.631 1.032–1.6760.9460.704–1.2730.8530.614–1.187
Underweight (<22) 1.199–1.661 1.179–1.671 1.005–1.597 1.025-1.657 1.163–1.871 1.075–1.824
χ 2 ( )

. .
HR= Hazard Ratio= Exp (b); CI= Confidence Interval.