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Table 2 Multivariable adjusted hazard ratios for CVD according to different levels of major risk factors

From: Classical risk factors of cardiovascular disease among Chinese male steel workers: a prospective cohort study for 20 years

Variables Range CVD events Number Person-years Incidence (per
1000 person years)
HR 95%CI
SBP (mmHg) < 120 88 1712 35895 2.45 1 -
  120-139 136 1641 33646 4.04 1.52 1.16-1.99
  140-159 99 635 12451 7.95 2.48 1.84-3.36
  160-179 45 194 3465 12.99 3.59 2.47-5.24
  ≥ 180 23 56 831 27.68 7.56 4.71-12.14
DBP (mmHg) < 80 75 1529 31955 2.35 1 -
  80-89 111 1500 30971 3.58 1.49 1.11-2.00
  90-99 96 751 15015 6.39 2.27 1.67-3.10
  ≥ 100 109 458 8347 13.06 4.19 3.07-5.71
PP (mmHg) < 35 72 1099 23008 3.13 1 -
  35-44 136 1737 35663 3.81 1.15 0.87-1.54
  45-54 93 909 18289 5.09 1.41 1.03-1.93
  ≥ 55 90 493 9328 9.65 2.08 1.50-2.87
MAP (mmHg) < 83.34 50 1112 23095 2.16 1 -
  83.34-93.33 85 1335 27824 3.05 1.32 0.93-1.88
  93.34-103.33 85 918 18885 4.5 1.75 1.23-2.50
  ≥ 103.34 171 873 16484 10.37 3.49 2.51-4.86
Cigarette dosage (cigarettes/day) Non-smoker 85 1126 23280 3.65 1 -
  1-9 89 1054 21334 4.17 1.37 1.02-1.85
  10-19 153 1691 33991 4.5 1.47 1.12-1.92
  ≥ 20 64 367 7683 8.33 2.43 1.75-3.38
TC (mg/dl) < 180 128 1879 38362 3.34 1 -
  180-199.9 90 931 18968 4.74 1.14 0.87-1.50
  200-219.9 77 682 13889 5.54 1.25 0.94-1.66
  ≥ 220 96 746 15069 6.37 1.42 1.08-1.85
BMI (kg/m2) - 391 4238    1.06 1.02-1.09
  1. Adjusted for age, TC, BMI, SBP, and daily cigarette dosage.