Table 2.

Description of items considered as indicators of neighborhood and household chaos

Item	Indicator	Original Question Stem	Original Response Format	Modified Question Stem	Modified Response Format
1	Interior Noise Rating [34]	House is not overly noisy (e.g., TV, shouts of children, radio, nearby roads or thoroughfares)	No; Yes	How would you rate the amount of noise inside the home? Focus on the noise produced by appliances, people, animals, etc. inside the home	Very quiet; Fairly quiet; Somewhat noisy; Very noisy
2	Hear Exterior Noise Inside [34]	Neighborhood noise around the home	Cannot rate; Very quiet; Average; Noisy; Very noisy	Is noise from outside the home audible when standing inside the home? Is there presence of loud ambient sounds (e.g., trains, construction, factories, traffic, people outside)?	No; Yes
3	Rating of Exterior Noise Audible Inside [34]	Neighborhood noise around the home	Cannot rate; Very quiet; Average; Noisy; Very noisy	How would you rate the amount of outside noise audible from inside the home?	Very quiet; Fairly quiet; Somewhat noisy; Very noisy
4	Noise Pollution [46]	Noise Pollution	None; A little; Some; A lot	Is there presence of loud ambient sounds? Can you hear trains, construction, factories, loud engines, etc.?	No; Yes
5	Exterior Noise Rating [49]	Amount of Noise	Very quiet; Fairly quiet; Somewhat noisy; Very noisy	How would you rate the level of noise overall?	Very quiet; Fairly quiet; Somewhat noisy; Very noisy
6*	Number of Changes to Household Roster	Sum of total changes (e.g., people leaving or joining household) to household roster between 18- and 24-month assessment			No changes; 1 change; 2 or more changes
7*	Regular Mealtime Routine [50]	Mealtimes occur at the same time each day			Strongly disagree; Disagree; Neither agree nor disagree; Agree; Strongly agree
8*	Number of Adults in the Household	Sum of the total number of adults (age ≥ 18 years) in household at 24-month visit			1 adult; 2 adults; 3 adults; 4 or more adults
9*	Number of Children in the Household	Sum of the total number of children (age < 18 years) in household at 24-month visit			1 child; 2 children; 3 children; 4 or more children
10*	Caregiver Marital Status Change	During our last visit, you told us that your marital status was: [MARITAL STATUS]. Is this your current marital status or has your marital status changed?			Did not change; Did changed
11*	Total Residential Moves	How many times have you moved since [CHILD] was born?	Did not move; Once; Twice; 3 times 4 time; More than 4 times		0 times; 1 time; 2 or more times
12*	Regular Bedtime Routine [51]	Do you have a regular routine of things you do with [CHILD] when you put [HIM/HER] to sleep?			No; Yes

13	Cluttered Interior [47]	All visible rooms of the house are reasonably clean and minimally cluttered.		The house is reasonably clean and minimally cluttered	No; Yes
14	Crowded with Furniture [47]	In terms of available floor space, the rooms are not overcrowded with furniture.		Rooms are overcrowded with furniture	No; Yes
15	Commotion [37]	There is very little commotion in our home	Very much like your own home; Somewhat like your own home; A little bit like your own home; Not at all like your own home	There is very little commotion in the home	No; Yes
16	Interruptions [37]	At home we can talk to each other without being interrupted	Very much like your own home; Somewhat like your own home; A little bit like your own home; Not at all like your own home	Family members talk without interrupting one another	No; Yes
17	Preparedness Rating [34]	Home visit preparation by the household	Cannot rate; Surprised/difficulty; Aware but unprepared; Aware/ready; Good hosts	How prepared did the household appear for the home visit?	Not at all prepared; Somewhat prepared; Quite a bit prepared; Very much prepared
18	Loud Speaking [37]	You can’t hear yourself think in our home	Very much like your own home; Somewhat like your own home; A little bit like your own home; Not at all like your own home	Family members speak to one another in an elevated volume	No; Yes
19	Telephone Use [37]	The telephone takes up a lot of our time at home	Very much like your own home; Somewhat like your own home; A little bit like your own home; Not at all like your own home	The telephone took up a lot of time in the home (e.g., ringing or active phone conversations)	No; Yes

20†	Arguments [37]	I often get drawn into other people’s arguments at home	Very much like your own home; Somewhat like your own home; A little bit like your own home; Not at all like your own home	Family members are drawn into other people’s arguments in the home	No; Yes
21†	Rushed [37]	We almost always seem to be rushed	Very much like your own home; Somewhat like your own home; A little bit like your own home; Not at all like your own home	Family members appear rushed	No; Yes

^*Items derived from caregiver surveys that were administered as part of the 18- and 24-month assessments

^† Excluded from exploratory factor analysis due to little variation in item responses