Table 2

Duration and Severity of RTI Symptoms, Restricted to First RTI in a Family With Known Illness Start Date (n = 197)

Group	No.	RTI Duration by Percentile, d					P Value^a
Group	No.	10^th	25^th	50^th	75^th	90^th	P Value^a
All children	197	4	7	9	14	23
Children with and without consultation^b
Consultation	16	6	9	13	18	37	.06
No consultation	181	4	6	9	13	21	.06
Upper and lower RTI symptoms^c,^d
Exclusively URTI	86	3	5	8	11	15	<.001
Any LRTI	104	6	8	12	18	29.5	<.001
Constitutional symptom severity scoree for upper and lower RTI, mean of maximum
	Upper RTI		Lower RTI

Fever	0.55		1.07
Fatigue	0.83		1.71
Disruption to sleep	1.15		2.19
Disruption to other activities	0.67		1.43

LRTI = lower respiratory tract infection; NHS = National Health Service; RTI = respiratory tract infection; URTI = upper respiratory tract infection.
↵a Log-rank test for difference between episodes with consultions and those without consultions.
↵b Any NHS primary care attendance according to medical notes.
↵c 7 RTI episodes which did not report any URTI- or LRTI-defining symptoms.
↵d URTI symptoms: earache, sore throat, runny/blocked nose, ear discharge, dry cough or barking/croupy cough. LRTI symptoms: wet/productive cough, breathing faster/shortness of breath, or wheeze/whistling chest.
e Maximum of daily scores in first 21 days, based on Likert scale 0 (normal, no problem) to 6 (as bad as it could be).