Table 2 Summary statistics of maternal physical activity based on actigraphy data of 190 low-risk pregnant women before pregnancy and at 13 weeks of gestation, presented with the number of measurements (n), mean or median, standard deviation (SD) or interquartile range (IQR), and 95% confidence interval of the mean (95% CI).

From: Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies

Term

n

Mean/Median

SD/IQR

95% CI

1st actigraphy recording (before pregnancy)

176

   

Days before estimated conception*

 

36**

10–75**

(43.8–59.5)

Number of recorded days

 

3.7

0.7

(3.6–3.8)

Total activity (min day−1)

 

354.7

120.9

(336.7–372.7)

Light activity (min day−1)

 

259.7

94.1

(245.7–273.7)

Moderate or vigorous activity (min day−1)

 

96.8

55.9

(88.5–105.1)

2nd actigraphy recording (week 13)

178

   

Gestational age (weeks)

 

13.2

0.8

(13.1–13.3)

Number of recorded days

 

3.7

0.6

(3.6–3.8)

Total activity (min day−1)

 

254.5

101.6

(239.5–269.5)

Light activity (min day−1)

 

198.8

83.1

(186.5–211.1)

Moderate or vigorous activity (min day−1)

 

57.5

36.2

(52.1–62.8)

  1. Daily maternal physical activity duration was classified as total, light, and moderate or vigorous activity.
  2. *Time to conception was calculated as the number of days from the start of the maternal actigraphy recording at inclusion to day 14 of the cycle that led to conception.
  3. **The median or IQR was calculated.
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