Table 2

HRs for all-cause mortality according to BMI trajectory groups in the Melbourne Collaborative Cohort Study, overall and in never-smokers

BMI trajectory groupsOverall n=(29 881)*Never-smokers n=(17 475)†
Person-yearsDeathsHR95% CIPerson-yearsDeathsHR95% CI
All-cause mortality
TR1 Lower-normal stable72 07711621.0045 4326041.00
TR2 Higher-normal stable141 98925070.900.84 to 0.9783 88112200.960.87 to 1.07
TR3 Normal to overweight103 97618260.960.89 to 1.0458 5158201.000.90 to 1.12
TR4 Borderline obesity chronic11 7112801.161.01 to 1.3362101201.251.02 to 1.53
TR5 Normal to class I obesity37 2356001.090.98 to 1.2122 7623151.191.03 to 1.37
TR6 Overweight to class II obesity‡12 3571877838107
Age 74 years1.311.11 to 1.541.421.13 to 1.78
Age 80 years1.191.00 to 1.421.271.02 to 1.59
Age 85 years1.100.88 to 1.381.160.88 to 1.54
  • *Adjusted for age, birth cohort, height, sex, country of birth, SEIFA, highest level of education, smoking status at latest BMI assessment, baseline MDS, alcohol drinking status and physical activity score.

  • †Adjusted for age, birth cohort, height, sex, country of birth, SEIFA, highest level of education, baseline MDS, alcohol drinking status and physical activity score.

  • ‡The p refers interaction between TR6 and attained age=0.04, tested using likelihood ratio test.

  • BMI, body mass index; MDS, Mediterranean Diet Score; SEIFA, Socio-Economic Indexes For Areas.