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Table 2 Descriptive characteristics of study participants (n = 367) by means of frequencies, mean (SD) and median (IQR)

From: Using accelerometers and global positioning system devices to assess gender and age differences in children’s school, transport, leisure and home based physical activity

  Girls Boys Children Adolescents Total
Population (%) 192 (52.3) 175 (47.7) 219 (59.7) 148 (40.3) 367 (100)
Mean age (SD) 13.2 (1.2) 13.1 (1.1) 12.4 (0.7) 14.3 (0.7) 13.2 (1.2)
Mean BMI (SD) a 18.9 (3.3) 18.6 (3.0) 18.4 (3.3) 19.3 (2.8) 18.8 (3.2)
Parental employment status b      
Both parents employed (%) 98 (52.7) 100 (59.2) 117 (55.5) 81 (56.3) 198 (55.8)
One or both unemployed (%) 88 (47.3) 69 (40.8) 94 (44.5) 63 (43.7) 157 (44.2)
Ethnicity c      
Danish background (%) 61 (32.4) 73 (42.4) 81 (37.5) 53 (36.8) 134 (37.2)
Immigrant or descendent (%) 127 (67.6) 99 (57.6) 135 (62.5) 91 (63.2) 226 (62.8)
Median daily hours of combined accelerometer and GPS data (IQR) 12.9 (11.9-13.6) 12.5 (11.4-13.4) 12.6 (11.9-13.5) 12.7 (11.3-13.6) 12.7 (11.6-13.5)
Mean valid days (SD) d 2.5 (1.1) 2.5 (1.1) 2.6 (1.1) 2.4 (1.0) 2.5 (1.1)
  1. Bold: significant difference p < 0.05.
  2. adata missing from 21 participants.
  3. bdata missing from 12 participants.
  4. cdata missing from 7 participants.
  5. dMinimum one valid week day of nine hours of combined accelerometer and GPS data.
  6. BMI, Body Mass Index; GPS, Global Positioning System; IQR, Inter Quartile Range; SD, Standard Deviation.