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Table 2 Hazard ratios (95%CI) for risk of type 2 diabetes according to waist circumference group by trajectory analysis, N = 4, 992

From: Waist circumference trajectories and risk of type 2 diabetes mellitus in Korean population: the Korean genome and epidemiology study (KoGES)

  No. of Persons No. of T2DM incidences Person years, follow-up Age adjusted rate Model 1a Model 2b Model 3c
HR (95% CI) HR (95% CI) HR (95% CI)
WC Group A 635 9 4033.6 193.9 1.0 1.0 1.0
WC Group B 1426 52 8984.2 498.4 2.6 (1.3–5.2) 2.5 (1.2–5.0) 2.2 (1.1–4.6)
WC Group C 1662 75 10,392.1 661.9 3.2 (1.6–6.4) 3.0 (1.5–5.9) 2.5 (1.2–5.0)
WC Group D 1012 104 6158.6 1845.9 7.4 (3.7–14.8) 7.0 (3.5–13.8) 5.4 (2.7–10.9)
WC Group E 257 36 1549.2 2045.0 10.0 (4.8–20.7) 10.0 (4.8–20.8) 7.3 (3.5–15.4)
P for trend      <.0001 <.0001 <.0001
C statistic      0.6841 0.6956 0.8689
  1. Abbreviation: T2DM type 2 diabetes mellitus, WC waist circumference, HR hazard ratio, CI confidence interval
  2. aModel 1: Adjusted for age, age square, sex, and family history of type 2 diabetes mellitus at wave 4
  3. bModel 2: Adjusted for Model 2 + smoking status, alcohol intake, physical exercise, and body mass index at wave 4
  4. cModel 3: Adjusted for Model 3 + systolic blood pressure, and total cholesterol at wave 4