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. 2018 May 18;20(5):e179. doi: 10.2196/jmir.9310

Table 1.

Baseline characteristics.

Characteristic Control (n=34)a Intervention (n=30)a
Mother’s age in years, mean (SD) 36.8 (6.5) 37.3 (4.0)
Children’s age in years, mean (SD) 2.5 (1.9) 2.9 (2.1)
Number of children, mean (SD) 1.8 (0.8) 1.4 (0.5)
Marital statusb, n (%)


Married or living as married 29 (88) 28 (93)

Never married 3 (9) 1 (3.3)

Separated or divorced 1 (3) 1 (3)
Race ethnicity, n (%)


African American 1 (3) 1 (3)

Asian 4 (12) 3 (10)

Latina 0 (0) 1 (3)

Middle Eastern 2 (6) 0 (0)

Two or more racesc 5 (15) 4 (13)

White 22 (65) 21 (70)
Employment, n (%)


Full time 17 (50) 18 (60)

Not employed 9 (27) 4 (13)

Part time 7 (21) 6 (20)

Student 1 (3) 2 (7)
Education level, n (%)


Some college 1 (3) 1 (3)

Bachelor degree 9 (27) 10 (33)

Post college degree 24 (71) 19 (63)
Currently breastfeeding, n (%) 15 (44) 12 (40)
Physical activity in minutes per week, mean (SD)


Moderate to vigorous 59.1 (80.1) 89.5 (112.5)

Vigorous 13.5 (29.6) 24 (44.8)

Moderate 32.1 (38.2) 41.5 (50.3)
BMId (kg/cm2), mean SD) 24.1 (3.3) 25.6 (4.6)
Physical activity measures in score, mean (SD)


Physical activity self-efficacy 3.5 (0.7) 3.6 (0.7)

Physical activity social support 2.0 (0.6) 2.1 (0.8)
PROMISe measures in T-scoref, mean (SD)


Depression 48.2 (6.8) 48.7 (7.6)

Sleep 57.7 (7.6) 57 (6.9)

Fatigue 60.0 (8.7) 59.4 (6.0)

Anxiety 50.4 (9.2) 51.9 (7.9)

aWe used stratified randomization (time and baseline activity status), which resulted in intervention and control arms of unequal sizes.

bOne person (from control arm) chose not to answer.

cRace/ethnicity—Two or more races category includes the following (n): Latina/white (1), Latina/Middle Eastern (1), Middle Eastern/white (3), Asian/white (2), American Indian/white (1), Mixed race-not specified (1).

dBMI: body mass index.

ePROMIS: Patient-Reported Outcome Measurement Information System.

fSee Methods for scoring of PROMIS measures