Objective
Determine trends and factors associated with bed-sharing.
Design
National Infant Sleep Position Study: Annual telephone surveys.
Setting
48 contiguous United States.
Participants
Nighttime caregivers of infants born within the last 7 months between
1993 and 2010. Approximately 1000 interviews annually.
Main Outcome Measure
Infant usually bed-sharing.
Results
Of 18,986 participants, 11% reported usually bed-sharing. Bed-sharing
increased between 1993 (6.0%) and 2010 (13.5%). While there was an increase
for Whites from 1993 to 2000 (p<0.001), there was no significant
increase from 2001 to 2010 (p=0.48). Blacks and Hispanics showed increase in
bed-sharing throughout the period 1993 to 2010, with no difference between
the two time periods (p=0.63 and 0.77, respectively). After accounting for
study year, factors associated with increase in usually bed-sharing
included: compared to college or more, maternal education less than high
school (AOR = 1.4; 95% CI, 1.1–1.8), compared to White race, maternal
race or ethnicity Black (AOR = 3.5; 95% CI, 3.0–4.1), Hispanic (AOR =
1.3; 95% CI, 1.1–1.6) and Other (AOR 2.5; 95% CI, 2.0–3.0),
compared to household income ≥$50,000, less than $20 000 (AOR = 1.7;
95% CI, 1.4–2.0) and $20–$50,000 (AOR=1.3; 95%CI
1.1–1.5), compared with living in the Midwest, living in the West
(AOR=1.6; 95%CI 1.4–1.9) or South (AOR=1.5; 95% CI=1.3–1.7),
compared with infant age ≥16 weeks, less than 8 weeks (AOR = 1.5;
95%CI 1.2–1.7 and 8–15 weeks (AOR-1.3; 95% CI=1.2–1.5)
and being born prematurely (AOR = 1.4; 95% CI, 1.2–1.6).
Thirty-six percent of the participants reported talking to a doctor
about bed-sharing. Compared with those who did not talk to a doctor, those
who reported their doctors had a negative attitude were less likely to
bed-share (AOR 0.66 (95% 0.53, 0.82), whereas a neutral attitude was
associated with increased bed-sharing. (AOR 1.4; 95%CI 1.1–1.8).
Conclusion
Our findings of the continual increase in bed-sharing throughout the
period 1993–2010 among Black and Hispanic infants suggests that the
current recommendation about bed-sharing is not universally followed.