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Table 2 Measured and self-reported wear time of the smart wristband during pregnancy and after delivery

From: Feasibility of smart wristbands for continuous monitoring during pregnancy and one month after birth

Weeks of pregnancy/postpartum

Second trimester, weeks 13–28 n = 20

Third trimester, weeks 29–41 n = 18

Postpartum, weeks 1–4 after delivery n = 13

Wear time, h/day

Adjusted mean (95% CI)

17.9 (15.2–20.7)

16.7 (13.8–19.5)

14.4 (11.4–17.4)

 • Min (h/day)

4.3

4.9

1.7

 • Max (h/day)

23.6

23.7

23.8

Self-reported wear time

 • All the time

15 (75%)

14 (78%)

9 (69%)

 • Several days/week

5 (25%)

4 (22%)

4 (31%)

 • Once a week

0

0

0

 • Not at all

0

0

0

The agreement between objective and self-reported

 Wear timea

Slight

Fair

Moderate

 κ (p-value)

0.13 (0.412)

0.38 (0.05)

0.514 (<0.001)

  1. a For the inter-rater agreement the objective wear time was categorized for each trimester and postpartum period as follows: All the time: 7 days/week ≥20 h/day; Several days/week: ≥ 3 days/week; Once a week: ≥ 1 day/week; Not at all: 0 h/week