Gender

Visit Number vs Baseline end-tidal carbon dioxide (ETCO2) awake

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Baseline	364	42.1	± 3.0	42.3	32.4	51.6	89	453
Follow-up	324	42.4	± 3.0	42.5	31.3	50.2	129	453

Treatment Arm vs Baseline end-tidal carbon dioxide (ETCO2) awake

Baseline

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	364	42.1	± 3.0	42.3	32.4	51.6	89	453
Early adenotonsillectomy (EAT)	186	42.4	± 2.9	42.5	34.7	51.6	40	226
Watchful waiting with supportive care (WWSC)	178	41.8	± 3.1	41.8	32.4	50.1	49	227

Treatment Arm vs Baseline end-tidal carbon dioxide (ETCO2) awake

Follow-up

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	324	42.4	± 3.0	42.5	31.3	50.2	129	453
Early adenotonsillectomy (EAT)	161	42.3	± 3.1	42.5	32.0	49.0	65	226
Watchful waiting with supportive care (WWSC)	163	42.5	± 3.0	42.6	31.3	50.2	64	227

Child's age vs Baseline end-tidal carbon dioxide (ETCO2) awake

Baseline

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	364	42.1	± 3.0	42.3	32.4	51.6	89	453
5 - 7 years old	271	42.0	± 3.1	42.1	32.4	51.6	58	329
8 - 10 years old	93	42.3	± 2.8	42.7	34.9	48.7	31	124

Child's age vs Baseline end-tidal carbon dioxide (ETCO2) awake

Follow-up

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	316	42.4	± 3.0	42.5	31.3	50.2	83	399
5 - 7 years old	217	42.4	± 2.7	42.5	31.3	49.0	45	262
8 - 10 years old	99	42.3	± 3.7	42.6	32.0	50.2	38	137

Child's gender vs Baseline end-tidal carbon dioxide (ETCO2) awake

Baseline

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	364	42.1	± 3.0	42.3	32.4	51.6	89	453
Female	185	42.4	± 3.1	42.5	32.4	50.1	49	234
Male	179	41.8	± 2.9	42.1	34.9	51.6	40	219

Child's gender vs Baseline end-tidal carbon dioxide (ETCO2) awake

Follow-up

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	324	42.4	± 3.0	42.5	31.3	50.2	129	453
Female	164	42.2	± 3.0	42.5	32.5	48.8	70	234
Male	160	42.6	± 3.0	42.7	31.3	50.2	59	219

Child's race vs Baseline end-tidal carbon dioxide (ETCO2) awake

Baseline

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	364	42.1	± 3.0	42.3	32.4	51.6	89	453
White	119	41.4	± 2.9	41.4	32.4	51.6	37	156
Black	212	42.5	± 3.0	42.7	33.5	50.1	37	249
Other	33	42.3	± 2.9	42.6	34.7	48.7	15	48

Child's race vs Baseline end-tidal carbon dioxide (ETCO2) awake

Follow-up

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	324	42.4	± 3.0	42.5	31.3	50.2	129	453
White	107	41.7	± 2.7	41.9	31.3	48.4	49	156
Black	186	42.8	± 3.1	43.0	32.3	50.2	63	249
Other	31	42.2	± 3.2	42.2	32.0	49.0	17	48

Childhood Adenotonsillectomy Trial