Table 4.

Comparison of operated RAT patients with 1–5 tonsillitis episodes versus ≥ 6 tonsillitis episodes in last 12 months (N = 1383).

Parameter	RAT with < 3 tonsillitis episodes in last 12 months		RAT with 3–5 tonsillitis episodes in last 12 months		RAT with ≥ 6 tonsillitis episodes in last 12 months		p
	n	%	n	%	n	%
All	276	100	862	100	245	100
Gender							0.231
Male	120	43.5	326	37.8	99	40.4
Female	156	56.5	536	62.2	146	59.6
Year							< 0.001
2011	133	48.2	404	46.9	88	35.9
2015	105	38.0	337	39.1	68	27.8
2019	38	13.8	121	14.0	89	36.3
Prior tonsil surgery							0.208
Yes	12	4.3	20	2.3	7	2.9
No	264	95.7	842	97.7	238	97.1
Prior adenoidectomy							0.091
Yes	26	9.4	120	13.9	26	10.6
No	250	90.6	742	86.1	219	89.4
Tonsillectomy/tonsillotomy							< 0.001
Tonsillectomy	263	95.3	853	99.0	242	98.8
Tonsillotomy	13	4.7	9	1.0	3	1.2
Additional adenoidectomy							0.546
Yes	0	0	2	22.2	0	0.0
No	276	100	860	99.8	245	100.0
Side of surgery							0.001
One side	9	3.3	5	0.6	2	0.8
Both sides	267	96.7	857	99.4	243	99.2

	Mean ± SD	Mean ± SD	Mean ± SD
Age, years*	22.0 ± 12.8	25.3 ± 12.3	24.6 ± 11.6	< 0.001

Significant p-values (p < 0.05) in bold.

NA not applicable, SD standard deviation.

*ANOVA with post-hoc Bonferroni correction: no difference between 2015 and 2019.