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Table 5 The potential risk factors of PRF in multivariate analysis

From: Risks of postoperative respiratory failure in elderly patients after hip surgery: a retrospective study

  Wald χ2 P OR (95% CI)
Pulmonary hypertension 4.081 0.039 1.132 (1.003–1.251)
Obstructive pulmonary disease 15.276 < 0.001 13.298 (4.021–43.298)
Bronchiectasis and emphysema 25.672 < 0.001 45.387 (11.231–187.87)
Previous history of respiratory failure 11.029 0.001 8.389 (2.391–21.982)