Table 1.

Baseline Characteristics at 1 Year of Age of the 1,995 Children Born Between April 1996 and April 1997, Leicester Respiratory Cohort, Leicestershire, United Kingdom, 1998–2003

Characteristic	No.	%
Male sex	1,049	53
South Asian ethnicity	308	15
Low birth weighta	130	7
Preterm birthb	121	6
Attended nursery care	574	29
Had older siblings	1,082	54
Maternal smoking	234	12
Paternal smoking	414	21
Breastfed	1,283	64
History of parental wheeze or asthmac	335	17
Higher parental educational levelc,d	932	47
Higher deprivation categoriese	475	24

^a Birth weight <2,500 g.

^b Gestational age <37 weeks.

^c Either mother or father.

^d Age at the end of education was >16 years.

^e Higher deprivation categories consist of deprived and more deprived categories based on the following ranges of Townsend Deprivation scores: more affluent (−6.222 to −2.635), affluent (−2.615 to −0.707), average (−0.705 to 1.859), deprived (1.861 to 5.147), and more deprived (5.160 to 11.072).