Table 1.

Number and characteristics of subjects in the various subgroups and of the 2 common subjects tested with all 6 aldehydes

Subject subgroups	Number of subjects	Average age (y ± SD)	Age range (y)	Number of males	Number of females
Propanal	16	26 ± 5	19–37	8	8
Butanal	18	22 ± 5	18–37	9	9
Hexanal	16	23 ± 5	18–37	9	7
Octanal	16	24 ± 5	19–37	7	9
Nonanal	17	25 ± 6	19–37	7	10
Helional	17	24 ± 5	19–37	7	10
Common subjects	2		20–37	—	2

SD, standard deviation.