Table 1.

Mean and range of age at enrolment

	n a	Mean age in years (SDb)	Range of age in years
Father	8763	33.3 (5.9)	18–74
Mother	22 230	31.2 (5.0)	14–47
Sibling of newborn	9393	4.0 (2.9)	0–44
Maternal grandfather	1657	63.0 (6.0)	28–81
Maternal grandmother	4276	58.8 (6.2)	32–82
Paternal grandfather	793	64.1 (5.9)	43–85
Paternal grandmother	1320	61.0 (5.9)	38–81
Great-grandparents	78	75.4 (6.7)	60–88
Extended family members	1474	29.0 (16.4)	0–83

^aTotal number of participants is not equal to that of Figure 3 because of complete withdrawal of consents before making this table. If a person had two or more family roles, the assignment order of priority was pregnant women/mother, newborn, father, grandparent, sibling, great-grandparent and extended family.

^bSD, standard deviation.