These were age greater than 60 years compared with 18
to 60 years (64% vs 32% [14/22 vs 24/75]; P = .01), ETT
size No. 7.0 compared with ETT 6.0 (51% vs 27% [25/49
vs 13/48]; P = .02), and the use of a throat pack compared
with no throat pack (64% vs 35% [9/14 vs 29/83); P =
.04), as shown in Table 2. The corresponding odds ratio
(OR) for these 3 variables were as follows: age greater
than 60 years, OR 3.72; intubation with ETT 7.0, OR
2.80; and use of a throat pack, OR 3.35 (Table 3).