Table 1

Gender, age and social grade of never smokers

Never smokerNon-susceptibleSusceptible
n=1025n=733n=286
N (%)N (%)N (%)
Gender
 Male528 (51.5)373 (51)152 (53)
 Female497 (48.5)360 (49)134 (47)
Age
 11215 (21)171 (23)43 (15)
 12204 (20)146 (20)56 (20)
 13206 (20)138 (19)67 (23)
 14176 (17)119 (16)55 (19)
 15132 (13)86 (12)46 (16)
 1692 (9)73 (10)19 (7)
Social grade
 ABC1462 (46)330 (46)132 (47)
 C2DE548 (54)391 (54)151 (53)