Table 4 Clinical factors associated with in-hospital mortality in elderly pneumonia patients

Age (years)

1.03 (1.01–1.05)

0.006

n/a

n/a

Sex (male)

0.89 (0.62–1.27)

0.518

n/a

n/a

Charlson comorbidity index

1.1 (1.02–1.18)

0.011

n/a

n/a

Do-not-resuscitate status

12.24 (7.26–20.64)

< 0.001

12.89 (7.19–23.1)

< 0.001

Body temperature (°C)

0.95 (0.85–1.07)

0.389

n/a

n/a

Mean arterial pressure (mmHg)

0.99 (0.98-1)

0.002

n/a

n/a

Pulse rate (beats/min)

1.01 (1-1.01)

0.122

n/a

n/a

Respiratory rate (breaths/min)

1.02 (1-1.04)

0.088

n/a

n/a

Glasgow coma scale score

0.87 (0.82–0.92)

< 0.001

0.91 (0.85–0.96)

0.002

Hemoglobin (g/dL)

0.89 (0.83–0.96)

0.002

0.9 (0.82–0.98)

0.012

White blood cells (×1000/µL)

1 (1–1)

0.478

n/a

n/a

Platelet (×10,000/µL)

1 (1–1)

0.901

n/a

n/a

Glomerular filtration rate (ml/min/1.73m2)

1 (0.99-1)

0.124

n/a

n/a

Type of pneumonia

0.064

n/a

Community-acquired pneumonia

Reference

-

n/a

n/a

Hospital-acquired pneumonia

1.53 (1.07–2.2)

0.021

n/a

n/a

Ventilator-associated pneumonia

1.87 (0.26–13.46)

0.535

n/a

n/a

Initial oxygen support

0.006

0.05

None

Reference

-

Reference

-

Cannula

0.91 (0.49–1.67)

0.749

1.13 (0.55–2.32)

0.742

Mask with bag

1.75 (0.95–3.21)

0.071

1.14 (0.56–2.31)

0.714

Endotracheal tube

1.21 (0.54–2.68)

0.646

2.44 (0.91–6.52)

0.076

Others

0.54 (0.22–1.36)

0.191

0.42 (0.15–1.19)

0.104