Table 1 Characteristics of the study populations of the ActivE and KORA FF4 study.

From: 24 h-accelerometry in epidemiological studies: automated detection of non-wear time in comparison to diary information

 

ActivE study

KORA FF4 study

Characteristics of study population

number of participants, N

47

559

men, %

51.1

46.9

 

Median

IQR

Median

IQR

age, years

43

(32–59)

58

(53–63)

height, cm

175.6

(165.8–180.1)

168.8

(162.0–176.8)

body weight, kg

78.3

(70.9–88.0)

78.9

(68.6–91.1)

BMI, kg/m²

25.4

(23.2–28.7)

27.2

(24.5–30.6)

NWT based on diary a

number of NWT periods/24 h

0.8

(0.6–1.0)

0.9

(0.6–1.0)

NWT/24 h, min

20.8

(12.4–30.3)

23.9

(13.6–44.5)

Proportion of NWT periods, %

total time of assessment b

>60 min

 

9.1

 

15.4

>90 min

 

4.5

 

8.7

>120 min

 

3.3

 

6.4

>150 min

 

2.0

 

5.1

>180 min

 

1.5

 

4.3

waking c

>60 min

 

8.6

 

13.1

>90 min

 

4.0

 

7.6

>120 min

 

2.6

 

5.2

>150 min

 

1.3

 

4.0

>180 min

 

0.5

 

3.2

sleeping c

>60 min

 

50.0

 

88.0

>90 min

 

50.0

 

84.0

>120 min

 

50.0

 

84.0

>150 min

 

50.0

 

84.0

>180 min

 

50.0

 

80.0

  1. BMI, body-mass index; IQR, interquartile range; NWT, non-wear time. aThe total number of waking and sleeping phases were summed up per participant and divided by two to consider one waking and one sleeping phase as average 24 h.
  2. bAnalyses were conducted from the first to the last recorded time point of assessment in the diary.
  3. cWaking and sleeping phases were derived from participants’ diary entries.