Table 2.

Multivariable Negative Binomial Regression for Length of Stay.

Variable	IRR	95% CI	P-value
Surgery type (ref: isolated adenoidectomy)
Standard T&A	1.27	1.07–1.51	0.007
Extended surgery	1.45	1.01–2.03	0.036
Tympanostomy tube (yes vs. no)	1.20	1.00–1.43	0.050

Variables not retained: cluster assignment, age, sex.