Table 3 Association between changes in BMI categories over 2 or 4 years and incident type 2 diabetes.

From: Impact of weight changes on the incidence of diabetes mellitus: a Korean nationwide cohort study

BMI category   Incidence ratea HR (95% CI)
Unadjusted Age-, sex-adjusted MVb-adjusted
2002 → 2006
NonOB NonOB still non-obese 4.82 1 1 1
OB becoming obese 7.62 1.58 (1.36–1.84) 1.55 (1.33–1.81) 1.49 (1.26–1.77)
OB NonOB slimming down 10.95 2.27 (1.96–2.64) 2.01 (1.73–2.33) 1.86 (1.58–2.20)
OB still obese 15.18 3.15 (2.91–3.42) 2.91 (2.69–3.16) 2.56 (2.34–2.81)
  P    <0.001 <0.001 <0.001
2002 → 2004
NonOB NonOB still non-obese 4.80 1 1 1
  OB becoming obese 8.59 1.78 (1.52–2.10) 1.73 (1.47–2.03) 1.74 (1.46–2.08)
OB NonOB slimming down 10.60 2.22 (1.90–2.58) 1.94 (1.66–2.26) 1.71 (1.43–2.04)
  OB still obese 15.21 3.17 (2.93–3.44) 2.93 (2.70–3.18) 2.62 (2.39–2.87)
  P    <0.001 <0.001 <0.001
  1. aPer 1000 person-years. bMV, multivariate includes age, sex, current smoking, alcohol drinking, exercise, income, hypertension, dyslipidemia, and a family history of diabetes.