Table 2.

Numbers of ancestors known to have started smoking regularly before 17 years of age for whom there are F3 measures of fat and lean mass [numbers who had started smoking < 13 years of age are in square brackets].

Ancestor	All F3s	Male F3s	Female F3s
	At 17	At 17	At 17
MGF	975 [67]	415 [26]	560 [41]
PGF	437 [31]	177 [12]	260 [19]
MGMF	542 [20]	252 [9]	290 [11]
MGFF	415 [15]	179 [6]	236 [9]
	At 24	At 24	At 24
MGF	820 [50]	304 [16]	516 [34]
PGF	394 [25]	148 [7]	246 [18]
MGMF	471 [12]	194 [< 5]	277 [8]
MGFF	338 [16]	135 [7]	203 [9]