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Table 2 Socio-demographic correlates of Body Mass Index (BMI)

From: Smoking and Socio-demographic correlates of BMI

   Obese vs   Overweight vs   Underweight vs
   Normal weight   Normal weight   Normal weight  
   OR+ 95 % CI P value OR+ 95 % CI P value OR+ 95 % CI P value
Age group (years) 18 to 34 Ref    Ref    Ref   
  35 to 49 1.0 (0.7–1.6) .87 1.2 (0.9–1.5) .29 0.6 (0.4–0.9) .0087
  50 to 64 1.2 (0.8–2.0) .3739 1.3 (1.0–1.8) .0599 0.5 (0.3–0.9) .0148
  65 and above 0.4 (0.2–1.0) 0.0611 1.4 (0.8–2.3) .2548 0.6 (0.2–1.6) .3066
Ethnicity Chinese Ref         
  Malay 4.7 (3.6–6.2) <.0001 2.0 (1.7–2.5) <.0001 0.7 (0.5–1.0) .0539
  Indian 3.6 (2.7–4.7) <.0001 2.0 (1.7–2.4) <.0001 0.6 (0.4–0.8) .0025
  Others 2.7 (1.5–4.9) .0016 1.4 (0.9–2.0) .0974 0.4 (0.2–1.3) .1319
Sex Male Ref         
  Female 0.7 (0.5–0.9) .0127 0.6 (0.5–0.7) <.0001 2.8 (2.0–4.0) <.0001
Marital Single Ref         
  Married 1.3 (0.8–2.0) .2887 1.2 (1.0–1.6) .1209 0.6 (0.5–0.9) .0134
  Divorced/Separated 1.4 (0.6–3.1) .4468 0.8 (0.5–1.4) .3988 0.8 (0.4–1.7) .5659
  Widowed 2.1 (0.8–5.6) .1611 1.6 (0.8–3.3) .2361 0.7 (0.2–2.4) .5974
Education Primary and below 2.1 (1.2–3.9) .0123 1.4 (0.9–2.1) .0976 1.0 (0.5–2.0) .9412
  Secondary 1.8 (1.1–2.9) .0208 1.3 (0.9–1.7) .167 1.1 (0.7–1.8) .7876
  Pre-U/Junior-college/Diploma 1.8 (1.1–2.9) .0262 1.1 (0.8–1.5) .4815 0.9 (0.6–1.4) .7431
  Vocational 2.3 (1.3–4.1) .0058 1.1 (0.7–1.6) 0.6593 1.6 (0.9–2.7) .1257
  University Ref         
Employment Employed Ref         
  Economically inactive# 1.1 (0.7–1.5) .7408 0.8 (0.6–1.1) .1888 0.9 (0.6–1.3) .4997
  Unemployed 1.3 (0.7–2.4) .4012 0.8 (0.5–1.4) .401 1.2 (0.7–2.1) .6006
Income Below $SD 20,000 Ref         
  $SD 20,000 to 49,999 1.2 (0.9–1.7) .2873 1.0 (0.8–1.3) .8953 0.7 (0.5–1.1) .1109
  $SD 50,000 and above 0.9 (0.5–1.5) .6098 1.1 (0.8–1.6) .4576 0.6 (0.4–1.1) .1117
Smoking No Ref         
  Yes 1.5 (0.9–2.5) .1411 1.1 (0.8–1.6) .5584 1.0 (0.6–1.8) .9424
  1. Bold font indicates significant p values
  2. # includes retirees, students and housewives
  3. +Odds Ratios derived from multinomial regression
  4. Ref: Reference