Table 2.

Incidence of fever, throat infections, sore throats, and upper respiratory tract infections per person year for children with mild symptoms of throat infections or adenotonsillar hypertrophy after adenotonsillectomy or watchful waiting

Variable	Adenotonsillectomy group	Watchful waiting group	Incidence rate ratio (95% CI)	Difference (95% CI)
Fever:
No of episodes	2.97	3.18	0.94 (0.84 to 1.04)	−0.21 (−0.54 to 0.12)
No of days	5.31	5.93	0.90 (0.83 to 0.97)	−0.62 (−1.06 to −0.18)
Throat infections:
No of episodes	0.56	0.77	0.73 (0.58 to 0.92)	−0.21 (−0.36 to −0.06)
No of days	0.83	1.36	0.61 (0.51 to 0.73)	−0.53 (−0.73 to −0.34)
Sore throat:
No of episodes	2.25	2.85	0.79 (0.70 to 0.89)	−0.60 (−0.90 to −0.30)
No of days	9.81	15.71	0.62 (0.59 to 0.66)	−5.91 (−6.57 to −5.24)
Upper respiratory tract infections and fever:
No of episodes	1.59	1.88	0.85 (0.73 to 0.98)	−0.29 (−0.53 to −0.04)
No of days	2.81	3.63	0.77 (0.70 to 0.86)	−0.82 (−1.16 to −0.49)
Upper respiratory tract infections:
No of episodes	5.47	6.00	0.91 (0.84 to 0.99)	−0.53 (−0.97 to −0.08)
No of days	78.16	89.92	0.87 (0.85 to 0.89)	−11.76 (−13.47 to −10.05)