Table 4.

Number (%) of patients with postoperative respiratory morbidity in relation to tracheal re-intubation

Respiratory morbidity	All patients (n=259)*	No Re-intubation (n=186)	Re-intubation (n=73)	P (χ2 test) (No re-intubation vs. re-intubation)
Sore throat	71 (27.4)	17 (9.1)	54 (74.0)	<0.001
Cough	84 (32.4)	46 (24.7)	38 (52.1)	<0.001
Hoarseness	15 (5.8)	4 (2.2)	11 (15.1)	<0.001

*In one patient in the derivation phase, the trachea remained intubated at the end of surgery for postoperative ventilation and hence respiratory morbidity could not be assessed