smoking
When perinatal risk factors were       combined with familial and social risk factors, ponderal index, maternal smoking,       parental asthma, and sibship size were all significant independent determinants       of asthma in these adolescents.
When perinatal risk factors were       combined with familial and social risk factors, ponderal index,  @OBJECT$  @PREDICAT$  @SUBJECT$ ,       parental asthma, and sibship size were all significant independent determinants       of asthma in these adolescents.