Skip to main content

Table 2 Hazard ratios (HRs) for diabetes according to baseline body mass index (BMI) and waist circumference (WC) values in older individuals (2015–2018)

From: Fluctuations in waist circumference increase diabetes risk: a 4-year cohort study in 61,587 older adults

BMI (kg/m2) Normal WC Abdominal obesity
 < 24 24–27.9  ≥ 28  < 24 24–27.9  ≥ 28
Number 24,806 12,556 775 3068 12,707 7675
New cases of diabetes (%) 433 (1.7%) 293 (2.3%) 22 (2.8%) 53 (1.7%) 348 (2.7%) 265 (3.5%)
No. per 1000 person-years 4.9 6.6 8.0 4.9 7.7 9.7
HR (95% CI)* 1.00 1.33 (1.15–1.54) 1.60 (1.05–2.46) 0.99 (0.74–1.31) 1.53 (1.33–1.77) 1.93 (1.66–2.25)
Men
 Number 11,184 6405 366 1047 5145 3064
 New cases of diabetes (%) 204 (1.8%) 16 (2.5%) 15 (4.1%) 14 (1.3%) 144 (2.8%) 99 (3.2%)
 No. per 1000 person-years 5.2 7.1 11.5 3.8 8.1 9.0
 HR (95% CI)* 1.00 1.38 (1.13–1.70) 2.24 (1.32–3.78) 0.75 (0.44–1.29) 1.54 (1.24–1.91) 1.76 (1.38–2.24)
Women
 Number 13,622 6151 409 2021 7562 4611
 New cases of diabetes (%) 229 (1.7%) 131 (2.1%) 7 (1.7%) 39 (1.9%) 204 (2.7%) 166 (3.6%)
 No. per 1000 person-years 4.7 5.8 4.8 5.4 7.5 10.1
 HR (95% CI)* 1.00 1.24 (1.00–1.54) 0.99 (0.47–2.10) 1.16 (0.82–1.62) 1.57 (1.30–1.90) 2.10 (1.72–2.56)
Age < 75 years
 Number 20,390 10,866 673 2448 10,827 6758
 New cases of diabetes (%) 377 (1.8%) 253 (2.3%) 21 (3.1%) 44 (1.8%) 310 (2.9%) 247 (3.7%)
 No. per 1000 person-years 5.2 6.5 8.8 5.1 8.1 10.2
 HR (95% CI)* 1.00 1.26 (1.08–1.48) 1.68 (1.08–2.61) 0.96 (0.71–1.32) 1.52 (1.31–1.77) 1.95 (1.66–2.29)
Age ≥ 75 years
 Number 4416 1690 102 620 1880 917
 New cases of diabetes (%) 56 (1.3%) 40 (2.4%) 1 (1.0%) 9 (1.5%) 38 (2.0%) 18 (2.0%)
 No. per 1000 person-years 3.6 6.7 2.7 4.1 5.7 5.5
 HR (95% CI)** 1.00 1.92 (1.28–2.89) 0.80 (0.11–5.77) 1.13 (0.56–2.28) 1.60 (1.06–2.41) 1.57 (0.92–2.67)
  1. *P < 0.001, **P < 0.05, CI, confidence interval
  2. The HRs were adjusted for confounders including baseline age, ALT and TBIL levels, alcohol consumption, and statin use