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Table 2 Adjusted Cox proportional hazards for associations of BMI and MNA-SF scores with 2-year all-cause mortality during follow-up intervals

From: Obesity may increase survival, regardless of nutritional status: a Swedish cohort study in nursing homes

   Hazard Ratio (95% Confidence Interval)
   0–24 months 0–6 months 6–12 months 12–18 months 18–24 months
  Deaths n(%) (n = 47,686) (n = 47,686) (n = 40,283) (n = 33,704) (n = 27,190)
Deaths, n (%) < 0.001a 23,335 (48.9) 7403 (15.5) 6579 (16.3) 5209 (15.5) 4144 (15.2)
BMI categ. (kg/m2) p < 0.001b      
  ≥ 30.0 2757 (36.1) 1 1 1 1 1
 25.0–29.9 6354 (43.4) 1.17 (1.12–1.22) 1.24 (1.13–1.36) 1.12 (1.03–1.22) 1.19 (1.09–1.31) 1.13 (1.02–1.25)
 18.5–24.9 11,519 (53.7) 1.58 (1.51–1.65) 1.84 (1.70–2.01) 1.48 (1.37–1.61) 1.52 (1.39–1.67) 1.44 (1.31–1.59)
  < 18.5 2705 (68.3) 2.56 (2.42–2.71) 3.45 (3.13–3.80) 2.26 (2.03–2.51) 2.31 (2.04–2.60) 1.92 (1.67–2.21)
BMI categ. (kg/m2) p < 0.001b      
 18.5–24.9 11,519 (53.7) 1 1 1 1 1
  < 18.5 2705 (68.3) 1.62 (1.55–1.69) 1.87 (1.75–2.00) 1.52 (1.40–1.66) 1.51 (1.37–1.67) 1.33 (1.18–1.50)
 25.0–29.9 6354 (43.4) 0.74 (0.72–0.76) 0.67 (0.63–0.71) 0.75 (0.71–0.80) 0.78 (0.73–0.84) 0.79 (0.73–0.84)
 30.0–34.9 2106 (36.5) 0.63 (0.60–0.66) 0.55 (0.50–0.60) 0.66 (0.60–0.72) 0.65 (0.59–0.72) 0.69 (0.62–0.77)
 35.0–39.9 482 (34.0) 0.62 (0.56–0.68) 0.48 (0.39–0.58) 0.70 (0.59–0.83) 0.64 (0.53–0.77) 0.69 (0.56–0.84)
  ≥ 40.0 169 (38.9) 0.80 (0.69–0.94) 0.71 (0.53–0.96) 0.87 (0.65–1.15) 0.83 (0.60–1.15) 0.82 (0.57–1.17)
MNA-SF categ. p < 0.001b      
 12–14 7023 (36.5) 1 1 1 1 1
 8–11 11,444 (53.3) 1.74 (1.69–1.79) 2.10 (1.97–2.23) 1.68 (1.59–1.78) 1.72 (1.62–1.83) 1.48 (1.38–1.58)
 0–7 4868 (69.8) 2.98 (2.87–3.10) 4.78 (4.48–5.11) 2.50 (2.32–2.69) 2.33 (2.14–2.54) 2.01 (1.82–2.22)
  1. Analyses were of MNA-SF scores (ref. 12–14), BMIs with obesity defined as BMI ≥ 30.0 kg/m2 (ref.) and BMIs with obesity divided into class I, II, III (ref. 18.5–24.9 kg/m2). They were adjusted for age, sex, education level, disposable income, dementia, hip fracture, chronic obstructive pulmonary disease, renal failure, rheumatoid arthritis, myocardial infarction, stroke and diabetes. BMI Body mass index (kg/m2), MNA-SF Mini Nutritional Assessment–Short Form. a P value for number of deaths in follow-up intervals. bP values for numbers of deaths in BMI categories and MNA-SF categories, respectively