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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Pediatrics. 2014 Dec 1;135(1):10–17. doi: 10.1542/peds.2014-1793

TABLE 1.

Characteristics of Study Population and Prevalence of Bedding Use, NISP Study, 1993 to 2010b

Characteristic Study Population
Prevalence of Bedding Use,a %
N %c
Mother's age, y
    <20 909 4.8 83.5
    20–29 9053 48.0 68.4
    ≥30 8096 47.2 60.8
Mother's race and ethnicity
    Other 816 4.3 74.6
    Hispanic 1160 6.1 76.1
    Black 1172 6.2 75.3
    White 15 728 83.3 63.5
Mother's education
    Less than high school 1050 5.6 81.9
    High school or GED test 4280 22.6 73.9
    Some college 5005 26.5 68.3
    College or more 8569 45.3 57.7
Infant age, wk
    <8 1141 7.8 68.1
    8–15 5456 29.7 68.1
    ≥16 11 488 62.5 64.3
Infant gender
    Female 9238 48.4 66.9
    Male 9697 51.2 64.2
Preterm birth, <37 wk
    Yes 2171 11.5 65.2
    No 16 727 88.5 55.6
First child
    Yes 8948 48.1 64.9
    No 9658 51.9 65.9
Geographic region
    West 2805 14.8 75.3
    New England 1030 5.4 67.3
    Mid-Atlantic 2579 13.6 65.8
    South 6640 35.0 61.0
    Midwest 5898 31.1 65.6

GED, General Educational Development.

a

Refers to certain types of bedding under the infant (blanket, bean bag, waterbed, rug, sheepskin, cushion, sleeping bag, or pillow) or covering the infant (blanket, quilt/comforter, sheepskin, pillow, or other) while sleeping in last 2 weeks. Covers exclude sheets and blankets not thicker than a receiving blanket.

b

Data include 18 952 participants.

c

Percentages have been rounded and might not total 100.