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Table 2 Comparison of key pupil demographics at Wave 0 and Wave 1

From: Accelerometer-measured physical activity and sedentary time among children and their parents in the UK before and after COVID-19 lockdowns: a natural experiment

 

Wave 0 (Pre-COVID-19)

Wave 1

n = 1296

n = 397

Child age: mean (SD)

11.0

(0.4)

 

10.8

(0.5)

Child gender: N (%)

 Male

616

(48%)

 

193

(50%)

 Female

680

(52%)

 

189

(49%)

 Other

   

2

(1%)

Child z-BMI: mean (SD)

0.35

(1.16)

 

0.38a

(1.24)

Parent age:

 < 35 yrs

106

(10%)

 

37

(10%)

 35–39 yrs

142

(13%)

 

79

(21%)

 40–44 yrs

414

(39%)

 

136

(35%)

 45–49 yrs

273

(26%)

 

94

(24%)

 50 + yrs

128

(12%)

 

39

(10%)

Parent gender: N (%)

 Male

294

(27%)

 

91

(24%)

 Female

794

(73%)

 

295

(76%)

 Other

   

1

(< 1%)

Parent ethnicity: N (%)

 White British

944

(87%)

 

305

(86%)

 White other

57

(5%)

 

23

(7%)

 Black/African/Caribbean/Black British

16

(1%)

 

4

(1%)

 Asian/Asian British

40

(4%)

 

16

(5%)

 Mixed

9

(1%)

 

4

(1%)

 Other

17

(2%)

 

4

(1%)

Household educationc: N (%)

 Up to GCSE/equivalent

243

(20%)

 

43

(11%)

 A level/equivalent

312

(26%)

 

93

(24%)

 Degree/HND/equivalent

435

(37%)

 

165

(43%)

 Higher degree

201

(17%)

 

86

(22%)

IMD rankb: median (IQR)

22,914

(15,839)

 

25,523

(11,342)

  1. az-BMI only collected on a subset of 241 children in Wave 1
  2. bIMD rank uses 2015 index for Wave 0 and 2019 index for Wave 1, with lower ranks indicating higher deprivation. IMD measures relative deprivation and so ranks can be compared
  3. cGCSE = qualification at age 16; A level = qualification at age 18
  4. Wave 0: Mar 2017-Jul 2018; Wave 1: May 2021-Dec 2021
  5. IMD Index of Multiple Deprivation, IQR inter-quartile range, SD standard deviation, z-BMI Body Mass Index standardised z-score, GCSE General Certificate of Education (qualification at age 16), HND Higher National Diploma