nausea booking interview
birthweight (g)
cigarettes per day
smoker1
smokegroup
nicotine
tar content
carbon monoxide
mothers social class (non-man/man)
bw adj ga ht sex par
gms alcohol last week
moclass
alcgroup
<13 cigs/day & <15mg co vs rest
cigsgp==2
alcgroup==1
alcgroup==2
alcgroup==3
alcgroup==4