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Table 2 HRs of All-cause mortality according to BMI and WC for participants

From: Hypertension modifies the associations of body mass index and waist circumference with all-cause mortality among older Chinese: a retrospective cohort study

Participant with hypertension Death Pearson-years of follow-up Mortality rate, per 10,000 pearson-year Model 1,HR (95%CI) Model 2,HR (95%CI) Participant without hypertension Death Pearson-years of follow-up Mortality rate, per 10,000 pearson-year Model 1,HR (95%CI) Model 2,HR (95%CI)
BMI grouped by 2 kg/m2       BMI grouped by 2 kg/m2      
 < 18 120 2332.6 514.4 1.127 (0.936–1.357) 1.099 (0.913–1.323)  < 18 162 2681.9 604.1 1.541 (1.309–1.815) 1.516 (1.287–1.785)
18–20 486 10,898.3 445.9 1.159 (1.049–1.282) 1.145 (1.036–1.267) 18–20 501 12,319.9 406.7 1.276 (1.151–1.414) 1.278 (1.153–1.416)
20–22 1159 31,095.6 372.7 1.097 (1.018–1.180) 1.092 (1.014–1.175) 20–22 1072 35,521.0 301.8 1.089 (1.006–1.179) 1.084 (1.001–1.174)
22–24 1825 61,725.7 295.7 Reference Reference 22–24 1396 58,620.5 238.1 Reference Reference
24–26 1262 51,445.5 245.3 0.930 (0.866–1.000) 0.932 (0.868–1.002) 24–26 726 36,923.7 196.6 0.984 (0.899–1.076) 0.992 (0.906–1.085)
26–28 803 37,189.9 215.9 0.896 (0.824–0.973) 0.902 (0.830–0.980) 26–28 312 20,026.7 155.8 0.814 (0.720–0.921) 0.824 (0.729–0.932)
28–30 396 19,245.8 205.8 0.860 (0.771–0.959) 0.864 (0.775–0.963) 28–30 140 8176.0 171.2 0.989 (0.830–1.177) 0.992 (0.833–1.181)
 ≥ 30 326 15,696.9 207.7 0.938 (0.833–1.056) 0.935 (0.831–1.053)  ≥ 30 69 4465.2 154.5 0.911 (0.715–1.161) 0.915 (0.718–1.166)
BMI, kg/m2       BMI, kg/m2      
 < 18.5 190.0 3879.5 489.8 1.053 (0.908–1.221) 1.074 (0.927–1.244)  < 18.5 246 4394.1 559.8 1.459 (1.280–1.663) 1.444 (1.267–1.646)
18.5–24 3400.0 102,172.8 332.8 Reference Reference 18.5–24 2885 104,749.2 275.4 Reference Reference
24–28 2065.0 88,635.4 233.0 0.877 (0.823–0.933) 0.881 (0.834–0.931) 24–28 1038 56,950.4 182.3 0.874 (0.814–0.939) 0.884 (0.822–0.949)
 ≥ 28 722.0 34,942.6 206.6 0.860 (0.766–0.966) 0.856 (0.790–0.929)  ≥ 28 209 12,641.1 165.3 0.908 (0.788–1.046) 0.912 (0.792–1.051)
BMI as a continuous variable (per SD increase) 6377 229,630.3 277.7 0.930 (0.906–0.953) 0.935 (0.912–0.958) BMI as a continuous variable (per SD increase) 4378 178,734.8 244.9 0.887 (0.856–0.918) 0.891 (0.861–0.923)
WC, cm       WC, cm      
 < 90 (male)/ < 85 (female) 4693 148,868.7 315.2 reference reference  < 90 (male)/ < 85 (female) 3676 136,719.9 268.9 Reference Reference
 ≥ 90 (male)/ ≥ 85 (female) 1684 80,761.6 208.5 0.873 (0.825–0.923) 0.880 (0.832–0.931)  ≥ 90 (male)/ ≥ 85 (female) 702 42,014.9 167.1 0.909 (0.838–0.986) 0.918 (0.846–0.996)
WC as a continuous variable (per SD increase) 6377 229,630.3 277.7 0.941 (0.918–0.965) 0.946 (0.922–0.969) WC as a continuous variable (per SD increase) 4378 178,734.8 244.9 0.944 (0.912–0.976) 0.948 (0.916–0.981)
  1. Abbreviations: HR Hazard ratio, CI Confidential interval, BMI Body mass index, WC Waist circumference
  2. Model 1: Adjusted age and sex
  3. Model 2: Model 1 plus marital status, current drinking, current smoking, regular exercise, resting heart rate