Associations of residence altitude (per 25 m) with study parameters
| Variables | ß | 95% CI | Standardised ß | P values |
| Age (per 1 year) | 0.03 | −0.02 to 0.07 | 0.05 | 0.30 |
| Male sex | −0.43 | −1.33 to 0.47 | −0.04 | 0.35 |
| Haemoglobin (per 1 g/L) | 0.05 | −0.18 to 0.28 | 0.02 | 0.66 |
| BNP at discharge (per 100 pg/mL) | 0.01 | −0.12 to 0.15 | 0.01 | 0.87 |
| Left ventricular ejection fraction (per 5%) | 0.05 | −0.11 to 0.21 | 0.03 | 0.51 |
| Krumholz score | 0.02 | −0.49 to 0.53 | 0.01 | 0.94 |
| Living alone | −0.50 | −1.58 to 0.57 | −0.04 | 0.36 |
| Low income* | 0.32 | −0.75 to 1.39 | 0.03 | 0.55 |
| Number of housemates (per one person) | −0.08 | −0.37 to 0.21 | −0.03 | 0.59 |
| Distance from patients’ residence to hospital† (per 10 km) | 1.31 | 0.94 to 1.67 | 0.32 | <0.01 |
| Population‡(per 100 persons) | −0.21 | −0.24 to −0.17 | −0.45 | <0.01 |
| Proportion of the population ≥75 years‡ (per 1%) | 0.34 | 0.29 to 0.39 | 0.54 | <0.01 |
| Number of hospital or clinics‡ | −0.99 | −1.21 to −0.77 | −0.39 | <0.01 |
| Mean temperature in a day§ (per 1°C) | −5.05 | −6.47 to −3.63 | −0.31 | <0.01 |
| Difference of temperature in a day§ (per 1°C) | 0.58 | 0.28 to 0.88 | 0.18 | <0.01 |
*Patients who were certified as a resident tax exemption.
†Kitaishikai Hospital.
‡In the minor administrative district (Cho-Aza district) located at patients’ residence.
§Average temperature in a day from July 2006 to June 2014 in the major administrative district (Gun-City district) located at patients’ residence.
BNP, B-type natriuretic peptide.