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. 2017 Jul 24;12(7):e0180818. doi: 10.1371/journal.pone.0180818

Table 2. Associations of BMI with total and cardiovascular mortality by age strata.

Total Mortality
BMI categories Pop/deaths /1000 p-y Adj HR (95% C.I.)
Whole cohort
 <18.5 (Underweight) 158/33 67.7 2.06 (1.27–3.35)
 18.5–22.9 (Normal weight) 1039/92 29.1 1.32 (0.90–1.95)
 23.0–24.99(Normal-weight-II) 595/37 19.7 1.00
 25.0–27.49 (Overweight Pre-obese-I) 467/34 23.5 1.12 (0.70–1.78)
 27.5–29.99 (Overweight-Pre-obese-II) 224/17 25.1 1.34 (0.75–2.38)
 ≥30.0 (Overweight Obese Class I, II, III) 121/11 28.6 1.52 (0.77–2.98)
Middle-aged cohort, 55–64 years
 <18.5 (Underweight) 63/5 25.0 4.92 (1.38–17.47)
 18.5–22.9 (Normal weight) 526/21 13.2 3.41 (1.27–9.17)
 23.0–24.99(Normal-weight-II) 295/5 5.4 1.00
 25.0–27.49 (Overweight Pre-obese-I) 225/7 10.0 2.10 (0.66–6.65)
 27.5–29.99 (Overweight-Pre-obese-II) 113/3 8.7 1.80 (0.42–7.67)
 ≥30.0 (Overweight Obese Class I, II, III) 70/4 18.7 4.05 (1.05–15.65)
Old cohort, 65+
 <18.5 (Underweight) 95/28 97.6 1.78 (1.05–3.02)
 18.5–22.9 (Normal weight) 513/71 45.3 1.09 (0.71–1.66)
 23.0–24.99(Normal-weight-II) 300/32 33.6 1.00
 25.0–27.49 (Overweight Pre-obese-I) 242/27 35.9 0.98 (0.58–1.65)
 27.5–29.99 (Overweight-Pre-obese-II) 111/14 42.0 1.29 (0.68–2.43)
 ≥30.0 (Overweight Obese Class I, II, III) 51/7 41.2 1.13 (0.50–2.59)