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Table 2 Cardiovascular events of study subjects according to BP and age categories

From: Blood pressure levels and cardiovascular risk according to age in patients with diabetes mellitus: a nationwide population-based cohort study

Clinical event  < 120/ < 70 mmHg 120–129/70–79 mmHg 130–139/80–89 mmHg 140–149/90–99 mmHg  ≥ 150/ ≥ 100 mmHg
Total      
 Events 1123 7625 13,764 8188 4696
 Person-years 92,622 567,439 983,762 484,528 204,774
 Incidence (events/100,000 person-years) 1212 1344 1399 1690 2293
 Adjusted HR (95% CI) 0.85 (0.80–0.90) 0.94 (0.92–0.97) Ref 1.12 (1.09–1.15) 1.33 (1.29–1.37)
 < 50 years
 Events 113 951 1763 874 430
 Person-years 30,886 167,650 288,016 119,956 39,039
 Incidence (events/100,000 person-years) 366 567 612 729 1101
 Adjusted HR (95% CI) 0.74 (0.61–0.90) 0.96 (0.89–1.04) Ref 1.20 (1.10–1.30) 1.79 (1.61–1.99)
50–59 years
 Events 265 1860 3409 1815 877
 Person-years 27,949 182,438 318,830 146,385 55,314
 Incidence (events/100,000 person-years) 948 1020 1069 1240 1585
 Adjusted HR (95% CI) 0.87 (0.77–0.99) 0.94 (0.89–1.00) Ref 1.16 (1.10–1.23) 1.43 (1.32–1.54)
60–69 years
 Events 425 2999 5361 3301 1916
 Person-years 24,115 158,546 276,831 155,068 72,302
 Incidence (events/100,000 person-years) 1762 1892 1937 2129 2650
 Adjusted HR (95% CI) 0.86 (0.78–0.95) 0.97 (0.92–1.01) Ref 1.09 (1.05–1.14) 1.32 (1.25–1.39)
 ≥ 70 years
 Events 320 1815 3231 2198 1473
 Person-years 9670 58,803 100,083 63,116 38,117
 Incidence (events/100,000 person-years) 3309 3087 3228 3482 3864
 Adjusted HR (95% CI) 0.99 (0.88–1.11) 0.95 (0.89–1.00) Ref 1.08 (1.03–1.14) 1.17 (1.10–1.25)
  1. HR, hazard ratio; CI, confidence interval. BP, blood pressure