Table 3: Relative risk ratios of the impact of body mass index categories on disability transitions and mortality among those who had disability in the baseline, São Paulo, Brazil—2000–2006.

VariablesADL IADL NAGI
RRRa95% CIRRR95% CIRRR95% CI

Recovery from disability
Age0.93 **0.92 **0.96 *
Female0.65 0.39 0.56
Smoking status
 Former smoker0.39 1.04 1.54
 Current smoker1.43 0.55 1.01
Number of chronic conditions0.72 *0.93 0.59 ***
Schooling1.03 0.99 1.05
Live alone0.55 1.11 3.24 **
BMI categories
 Underweight0.37 0.14 0.62
 Overweight1.01 0.80 0.82
 Obese0.48 0.77 0.46 *
Mortality
Age1.12 ***1.07 ***1.10 ***
Female0.40 *0.65 0.48 **
Smoking status
 Former smoker1.33 1.75 1.75 *
 Current smoker3.35 *3.09 **2.30 **
Number of chronic conditions0.87 0.97 0.98
Schooling0.98 1.04 0.95
Live alone1.03 0.88 1.23
BMI categories
 Underweight0.97 1.28 0.9
 Overweight0.35 0.75 0.79
 Obese0.54 0.66 0.78
Lost to followup or missing disability status in 2006
Age1.00 1.00 1.01
Female0.50 1.40 0.93
Smoking status
 Former smoker0.40 0.69 1.09
 Current smoker0.62 0.86 0.66
Number of chronic conditions0.73 0.88 0.88
Schooling1.16 1.07 1.03
Live alone1.73 1.43 2.38 **
BMI categories
 Underweight1.67 1.42 1.85 *
 Overweight0.43 0.90 1.27
 Obese0.92 1.14 1.24
3685811,134
BIC′30.3362.47−42.91

ADL: activities of daily living; IADL: instrumental activities of daily living; RRR: relative risk ratio; CI: confidence interval; BMI: body mass index.
aRemaining with disability is the reference category. Normal weight is the reference category for BMI, living accompanied is the baseline category for household arrangement, and never smoked is the reference category for smoking status.
*** ; ** ; * .