Mothers who are Los Angeles County residents who delivered a
baby during the preceding two to six months are eligible for LAMB. The
survey asks about some events that happened several months prior to
pregnancy, so mothers who have babies over seven months old are ineligible
because of the difficulty they might have recalling events accurately.
Adoptive mothers are ineligible because many of the questions ask about
attitudes and perceptions only known to the birth mother.
The Project adopts a mixed data collection method from the CDC's Pregnancy
Risk Assessment Monitoring System (PRAMS). All mothers chosen
to participate in LAMB receive a letter that explains the project, invites
participation, and announces the arrival of the survey packet in 10 to 14
days. Respondents receive a $20 Ralphs/Food4 Less certificate.
Mothers who do not respond to the survey in two weeks are sent a reminder
postcard. After 7-10 days, nonrespondents are mailed a second survey
packet. Nonrespondents are called for a telephone interview two weeks
after the second packet is mailed.