Table 6

Effect of providing extensive preliminary information: odds ratios of participation between the two genetic subcohorts at baseline and after 6 months

Dependent variable	Independent variables	At baseline		After 6 months
Dependent variable	Independent variables	OR	95%CI	OR	95%CI
p<0⋅05, *p<0⋅001 (two-tailed).
†Male = 0; female = 1.
‡No = 0, Takashima; yes = 1, Makino.
Participation in basic survey	Gender†	0⋅79	0⋅61 to 1⋅03	0⋅79	0⋅61 to 1⋅02
	Age (years)	0⋅98**	0⋅97 to 0⋅99	0⋅98**	0⋅97 to 0⋅99
	Extensive information‡	0⋅63**	0⋅49 to 0⋅81	0⋅65*	0⋅51 to 0⋅83
Participation in blood sample preservation	Gender†	0⋅77*	0⋅59 to 0⋅99	0⋅76*	0⋅59 to 0⋅98
for future use	Age (years)	0⋅98**	0⋅97 to 0⋅99	0⋅98**	0⋅97 to 0⋅99
	Extensive information‡	0⋅69*	0⋅54 to 0⋅87	0⋅70*	0⋅55 to 0⋅90
Participation in examination of medical	Gender†	0⋅73*	0⋅56 to 0⋅94	0⋅72*	0⋅56 to 0⋅93
records and death certificate	Age (years)	0⋅98**	0⋅98 to 0⋅99	0⋅98**	0⋅98 to 0⋅99
	Extensive information‡	0⋅71*	0⋅56 to 0⋅90	0⋅73*	0⋅57 to 0⋅93
Participation in genetic analysis	Gender†	0⋅73*	0⋅57 to 0⋅94	0⋅73*	0⋅56 to 0⋅94
	Age (years)	0⋅98**	0⋅97 to 0⋅99	0⋅98**	0⋅97 to 0⋅99
	Extensive information	0⋅70*	0⋅55 to 0⋅89	0⋅72*	0⋅57 to 0⋅91
Participation in DNA sample preservation	Gender†	0⋅75*	0⋅58 to 0⋅96	0⋅74*	0⋅58 to 0⋅95
for future analysis	Age (years)	0⋅98**	0⋅97 to 0⋅99	0⋅98**	0⋅97 to 0⋅99
	Extensive information‡	0⋅74*	0⋅59 to 0⋅94	0⋅76*	0⋅60 to 0⋅97