Table 2.

The treatments and prognoses of patients with definitive PA, indeterminate PA, and non-PA pneumonia

Variable	Definitive PA Pneumonia aOR (95% CI)	Indeterminate PA Pneumonia aOR (95% CI)
Hospitalization	1.09 (0.43–2.73)	2.36 (1.40–3.97)
Treatment
Antipseudomonal drug	12.22 (4.45–33.56)	3.53 (2.37–5.25)
Two antipseudomonal drugs	19.87 (3.64–108.53)	2.26 (0.47–10.88)
Respirator	5.40 (1.96–14.84)	1.35 (0.67–2.72)
Vasopressor	5.11 (1.52–15.34)	0.83 (0.30–2.29)
Treatment duration >10 d	2.65 (1.19–5.89)	3.17 (2.19–4.60)
Treatment failure	2.66 (0.89–7.96)	3.34 (2.07–5.39)
Mortality
14-d mortality	13.04 (4.42–38.51)	1.35 (0.59–3.11)
30-d mortality	9.89 (3.67–26.66)	1.78 (0.94–3.36)

Definition of abbreviations: aOR = adjusted odds ratio; CI = confidence interval; PA = Pseudomonas aeruginosa.

Multinomial logistic regression models were used to explore the clinical factors associated with the three groups (definitive PA, indeterminate PA, and non-PA pneumonia). For comparisons between definitive PA and non-PA pneumonia and between indeterminate PA and non-PA pneumonia, non-PA pneumonia was used as a baseline group. The model was adjusted for age, sex, nursing home residency, chronic obstructive pulmonary disease, past history of pneumonia, and CURB-65 scores (Confusion, Urea >7 mmol/l, Respiratory rate ≥30/min, low systolic (<90 mm Hg) or diastolic (≤60 mm Hg) Blood pressure, age ≥65 years). CURB-65 scores was calculated and one point given for each feature present.