Table 1.

Valid data for each variable for children at three years of age

	Child (n = 406)	Female caregiver (n = 406)	Male caregiver (n = 386)
Country of birth	405	405	382
Home language/communication	401	402	382
Education language/communication	390	Not applicable	Not applicable
Caregiver education	Not applicable	404	375
Socioeconomic status	378	378	253
Familial hearing loss	406	Not applicable	Not applicable
Additional disabilities	402	Not applicable	Not applicable

Note. Values are not equal across all fields as some static information (e.g., country of birth and gender) were able to be obtained from information provided at other assessment intervals.