Table 1

Mean differences in peak expiratory flow rate (PEFR) between those with and without recent wheeze and asthma diagnosis (N = 13 826)

	N*	PEFR (l/min)	Mean	Difference(No–yes) (95% CI)**
*N for mean PEFR (N for PEFR % predicted was slightly different).
**p<0.01 for all comparisons.
Recent wheeze
Men
No	4857	Mean	374
		% predicted	105
Yes	814	Mean	335	39 (28 to 51)
		% predicted	97	8 (4 to 11)
Women
No	6718	Mean	308
		% predicted	104
Yes	1437	Mean	274	34 (26 to 41)
		% predicted	96	8 (6 to 11)

Asthma diagnosis
Men
No	5460	Mean	370
		% predicted	104
Yes	211	Mean	337	33 (5 to 61)
		% predicted	95	9 (2 to 16)
Women
No	7843	Mean	304
		% predicted	103
Yes	312	Mean	269	35 (20 to 50)
		% predicted	93	11 (6 to 15)