Validity of information on atopic disease and other illness in young children reported by parents in a prospective birth cohort study

Table 1 Frequencies and completeness of diagnoses in groups

	COPSAC (n)	Missed events	Total (N)	Completeness (n/N)
Atopic disease (Ever)	172	0	172	1.00
Asthma	48	0	48	1.00 [0.94, 1.00]*
Atopic dermatitis	113	0	113	1.00 [0.97, 1.00]*
Allergic rhinitis	11	0	11	1.00 [0.76, 1.00]*
Airway related disease	3104	154	3258	0.95 [0.94, 0.96]**
Common cold	1690	61	1751	0.97
Otitis media	587	44	631	0.93
Pneumonia	264	11	275	0.96
Cough	208	23	231	0.90
Tonsilitis	130	10	140	0.93
Tubulation	106	1	107	0.99
Croup	85	4	89	0.96
RS-virus	33	0	33	1.00
Pertussis	1	0	1	1.00
Skin related disease	878	49	927	0.95 [0.93, 0.96]**
Dermatitis	438	13	451	0.97
Dry skin	166	0	166	1.00
Erythema	96	13	109	0.88
Nappy dermatitis	93	7	100	0.93
Impetigo	41	6	47	0.87
Urticaria	32	8	40	0.80
Herpes infection	12	2	14	0.86
Childhood infections	969	88	1057	0.92 [0.89, 0.94]**
Fever	684	81	765	0.89
Chicken pox	110	1	111	0.99
3-day fever	72	6	78	0.92
Influenza	63	0	63	1.00
Fever cramps	25	0	25	1.00
Erythema infectiosum	8	0	8	1.00
Scarlet fever	7	0	7	1.00
Other illness	1010	295	1305	0.77 [0.74, 0.80]**
Diarrhea and Vomiting	417	62	479	0.87
Conjunctivitis	252	114	366	0.69
Candidiasis	68	31	99	0.69
Constipation	28	10	38	0.74
Minor trauma	18	37	55	0.33
Adenectomy	14	0	14	1.00
Insect bite	11	5	16	0.69
Urinary Tract infection	10	1	11	0.91
Molluscs	9	2	11	0.82
Abscess	6	2	8	0.75
Mononucleosis	3	0	3	1.00
Septicaemia	3	0	3	1.00
Burn	2	6	8	0.25
Other, non-infectious events	169	25	194	0.87
Total	6134	586	6719	0.91 [0.90,0.92]**