Demographics of children.

N = number, f = female, y = years, Y = yes, SS16 = 16 item Smell Identification Test; PIT-SS16-Child = picture identification test for the 16 items of the SS16, SD = standard deviation; * = subjects were divided into 2 main categories of higher (A) or lower (B) income. The proportion of pre-school children in each pilot was as follows: pilot 1 = 1/10 (10.0%), pilot 2 = 1/9 (11.1%), pilot 3 = 4/10 (40%), pilot 4 = 9/51 (17.6%). Demographics of children.