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Table 3 Adjusted Cox proportional hazards for the association of BMI according to MNA-SF score with 2-year all-cause mortality

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

    Hazard Ratio (95% Confidence Interval)
  n Deaths n(%) 0–24 months 0–6 months 6–12 months 12–18 months 18–24 months
MNA-SF 12–14
 BMI ≥30.0 4661 1409 (30.2) 1 1 1 1 1
 BMI 25.0–29.9 8177 2969 (36.3) 1.13 (1.06–1.20) 1.09 (0.95–1.25) 1.11 (0.98–1.25) 1.11 (0.98–1.27) 1.22 (1.06–1.39)
 BMI 18.5–24.9 6419 2645 (41.2) 1.28 (1.20–1.37) 1.36 (1.18–1.56) 1.22 (1.08–1.38) 1.22 (1.07–1.40) 1.38 (1.20–1.58)
 BMI < 18.5 0 NA NA NA NA NA NA
MNA-SF 8–11
 BMI ≥ 30.0 2675 1168 (43.7) 1.60 (1.48–1.73) 1.78 (1.52–2.09) 1.61 (1.39–1.86) 1.42 (1.21–1.67) 1.62 (1.37–1.92)
 BMI 25.0–29.9 5728 2887 (50.4) 1.86 (1.74–1.98) 2.30 (2.01–2.62) 1.72 (1.52–1.93) 1.84 (1.62–2.10) 1.61 (1.39–1.86)
 BMI 18.5–24.9 11,385 6378 (56.0) 2.12 (2.00–2.25) 2.59 (2.29–2.93) 2.00 (1.79–2.23) 2.04 (1.81–2.30) 1.92 (1.69–2.19)
 BMI < 18.5 1671 1011 (60.5) 2.42 (2.23–2.63) 2.92 (2.48–3.42) 2.22 (1.90–2.59) 2.56 (2.17–3.03) 2.06 (1.69–2.51)
MNA-SF 0–7
 BMI ≥ 30.0 291 180 (61.9) 2.86 (2.44–3.36) 4.81 (3.74–6.17) 1.85 (1.31–2.61) 2.66 (1.89–3.74) 2.20 (1.44–3.37)
 BMI 25.0–29.9 750 498 (66.4) 3.17 (2.86–3.52) 5.48 (4.62–6.51) 2.29 (1.86–2.84) 2.36 (1.86–3.01) 2.40 (1.83–3.14)
 BMI 18.5–24.9 3641 2496 (68.6) 3.25 (3.03–3.47) 5.14 (4.52–5.85) 2.71 (2.38–3.07) 2.54 (2.20–2.93) 2.38 (2.02–2.79)
 BMI < 18.5 2288 1694 (74.0) 4.01 (3.73–4.32) 6.47 (5.65–7.40) 3.36 (2.92–3.86) 2.92 (2.47–3.44) 2.69 (2.22–3.26)
  1. The reference group was MNA-SF score = 12–14 and BMI ≥ 30.0 kg/m2. Analyses 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, NA Not available