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From:

TABLE 1

Sample Characteristics at the 3-Month Baseline Visit by Daily TV Exposure

Sample CharacteristicTotal Sample (n = 217)TV Viewing Levela
<1 h TV (n = 44)1–3 h TV (n = 108)>3 h TV (n = 55)
Maternal age, y22.7 ± 3.822.8 ± 4.422.5 ± 3.822.8 ± 3.3
Maternal education, high school graduate, % (n)42.7(90)50.0 (22)41.1 (44)39.3 (22)
Marital status, % single (n)88.8 (190)86.4 (38)88.2 (97)91.1 (51)
Currently working, % (n)53.7 (115)61.4 (27)50.9 (56)50.0 (28)
Maternal obesity, BMI >30, % (n)44.2 (96)36.4 (16)40.5 (45)55.4 (31)b
Depression, % (n)c29.1 (62)29.6 (13)24.1 (26)38.2 (21)
Infant gender, % male (n)46.5 (101)45.5 (20)40.5 (45)55.4 (31)
Infant overweight, % (n)d29.5 (64)25.0 (11)33.3 (37)26.8 (15)
Infant temperament score
Activitye4.1 ± 0.823.9 ± 0.854.1 ± 0.844.3 ± 0.75f
DTLg3.5 ± 0.743.3 ± 0.653.5 ± 0.753.6 ± 0.78
Crying duration, h1.58 ± 2.091.19 ± 1.951.69 ± 2.051.79 ± 2.32
Any breastfeeding, % (n)h22.6 (49)29.6 (13)25.2 (28)14.3 (8)

Data are presented as means ± SD unless otherwise indicated.

aDifferences between groups tested with nonparametric tests of trend for dichotomous variables and 1-way analysis of variance for continuous variables.
bP < .05.
cScore ≥16 on the Center for Epidemiologic Studies Depression Scale.
dGreater than the 90th percentile for weight-for-height of the 2000 Centers for Disease Control and Prevention National Center for Health Statistics growth charts.
eScore from the activity subscale of the IBQ-R.21
fP < .05 for <1 h TV compared with >3 h of TV.
gScore from the DTL scale of the IBQ-R.21
hAny breastfeeding in 24-h recalls.