Table 1.

Attendance at the clinics at which anthropometric measurements were made, and proportions with data on the smoking of the maternal and paternal grandmothers in utero

Age at focus clinic	No. attending	No.(%) with information on MGM	No. (%) with information on PGM
7 Years	8,290	7,352 (88.7%)	5,994 (72.3%)
9 Years	7,722	6,869 (89.0%)	5,602 (72.5%)
11 Years	7,153	6,395 (89.4%)	5,221 (73.0%)
13 Years	6,147	5,504 (89.5%)	4,544 (73.9%)
15 Years	5,515	4,931 (89.4%)	4,096 (74.3%)
17 Years	5,217	4,601 (88.2%)	3,795 (72.7%)

MGM, maternal grandmother; PGM, paternal grandmother.