Table 2.

Cognitive tests included in the study.

Name	Description	Score Range
Immediate word recall	The interviewer read 1 of 4 possible lists of 10 nouns to the respondent. The lists do not overlap in word content and the initial list was randomly assigned to the respondent, in a longitudinal manner such that each respondent was assigned a different set of words in each of four successive waves of data collection.	0–10
Delayed word recall	After approximately 5 minutes of asking other survey questions (eg, depression, and cognition items including backward count, and serial 7’s) the respondent was asked to recall the nouns previously presented as part of the immediate recall task.	0–10
Serial 7’s task	The interviewer asked the respondent to subtract 7 from 100, and continue subtracting 7 from each subsequent number for a total of 5 trials.	0–5
Backward count	Respondents were asked to count backward for 10 continuous numbers beginning with the number 20.	0–2