4

Protocol for 6 week cycle of data collection

Conduct in-person pregnancy screener *

1 week from PS:
Thank you contact in
assigned mode
6 weeks from PS:
Initiate respondent
identified mode of
data collection

7 weeks: Have not
completed data
collection

7 weeks: Completed
data collection

Reminder
contact in
same mode, w/
ability to collect
data

11 weeks: Have not
completed data
collection

7 weeks: Have not
completed data
collection

7 weeks: Completed
data collection

Leave IVR
message if no
contact, with
800 number

11 weeks:
Completed data
collection

11 weeks: Have not
completed data
collection

11 weeks:
Completed data
collection

Send postal advance letter

Send postal advance letter

12 weeks:
Initiate 2nd
contact using
IVR data
collection

6 weeks from PS:
Initiate IVR data
collection

12 weeks:
Initiate 2nd
contact using
same mode of
data collection

12 weeks:
Initiate 2nd
contact using
new mode of
data collection

* Only participants with more than one possible mode of contact will participate in experiment.
Of those, half will be assigned to IVR and half to self-identified mode of response.

12 weeks:
Initiate 2nd
contact using
IVR data
collection