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Table 3 Multinomial regression analysis for change in mental HRQL

From: Preoperative determinants of quality of life a year after coronary artery bypass grafting: a historical cohort study

  Worse mental HRQL Better mental HRQL
Beta OR (95% CI) Beta OR (95% CI)
Age (per year) −0.02 0.98 (0.93–1.02) 0.01 1.01 (0.97–1.04)
Body mass index (per point) 0.02 1.02 (0.96–1.08) 0.01 1.01 (0.96–1.06)
EuroSCORE (per point) 0.02 1.02 (0.85–1.23) −0.07 0.94 (0.80–1.10)
LVEF > 50% 0 0 0 0
LVEF 30–50% −0.36 0.84 (0.21–3.39) 1.13 3.09 (0.60–15.83)
LVEF < 30% − 0.18 0.70 (0.19–2.63) 0.66 1.93 (0.40–9.36)
Hemoglobin (per point) −0.15 0.86 (0.61–1.23) 0.03 1.07 (0.80–1.43)
Creatinine (per point) 0.01 1.01 (1.00–1.02) −0.00 1.00 (0.99–1.01)
Preoperative physical HRQL (per point) − 0.00 1.00 (0.95–1.05) 0.08*** 1.08 (1.04–1.13)
Preoperative mental HRQL (per point)
 Singular 0.02   −1.07**  
 Quadratic −0.01   0.02**  
 Cubic 0.00 a 0.00** a
Male gender 0.15 1.17 (0.52–2.61) −0.04 0.96 (0.50–1.85)
Active smoking − 0.09 0.92 (0.51–1.65) 0.03 1.04 (0.65–1.65)
Hypertension 0.16 1.18 (0.71–1.95) 0.12 1.13 (0.75–1.71)
Myocardial infarction 0.20 1.23 (0.60–2.51) −0.56 0.57 (0.29–1.11)
Stroke − 0.03 0.97 (0.37–2.50) 0.18 1.19 (0.57–2.52)
Pulmonary disease 0.37 1.45 (0.63–3.34) −0.62 0.54 (0.25–1.14)
Atrial fibrillation 0.39 1.48 (0.44–4.99) −0.35 0.71 (0.23–2.15)
Peripheral vascular disease 0.00 1.00 (0.41–2.44) 0.34 1.41 (0.72–2.77)
Unstable angina 0.17 1.12 (0.52–2.74) 0.20 1.22 (0.62–2.41)
Diabetes mellitus − 0.6 0.94 (0.49–1.81) 0.02 1.02 (0.60–1.74)
  1. Unchanged HRQL was the reference category. Worse and Better HRQL were defined as ≥5 points change in delta HRQL respectively
  2. LVEF Left ventricular ejection fraction, HRQL health related quality of life
  3. **p = < 0.005, *** = p < 0.00
  4. aSince clinical interpretation of odds ratios is limited for quadratic and cubic equations this is not presented