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Table 5 Time and interaction effects for sedentary behaviour outcomes in preschoolers from low, medium and high SES kindergartens (adjusted for age and gender)

From: The effect of a cluster randomised control trial on objectively measured sedentary time and parental reports of time spent in sedentary activities in Belgian preschoolers: the ToyBox-study

  Outcomes   Mean difference (follow-up - baseline) Time Time* Condition
β (SE) 95 % CI β (SE) 95 % CI p-value
LOW SES KINDERGARTENSa
Accelerometer SB weekday I −0.04 % −0.04 (0.69) −1.40 to 1.32 0.00 (0.92) −1.80 to 1.80 0.99
   C −0.04 %
  SB weekend day I −1.51 % −1.50 (1.07) −3.59 to 0.60 -0.01 (1.42) −2.79 to 2.77 0.99
   C −1.50 %
  Total SB I −0.47 % −0.08 (0.62) −1.31 to 1.14 -0.39 (0.83) −2.01 to 1.23 0.64
   C −0.08 %
  SB school hours I −0.28 % 0.06 (0.85) −1.61 to 1.72 −0.34 (1.13) −2.55 to 1.88 0.77
   C −0.06 %
  SB after school hours I −2.07 % −3.01 (1.12)** −5.20 to -0.81 0.94 (1.48) −1.97 to 3.84 0.53
   C −3.01 %
Questionnaire TV week I +0.63 min/day 2.24 (2.05) −1.77 to 6.25 1.61 (2.83) −7.16 to 3.94 0.57
   C +2.24 min/day
  TV weekend I −3.55 min/day −4.38 (3.78) −11.79 to 3.03 0.83 (5.24) −9.44 to 11.10 0.87
   C −4.38 min/day
  PC week I +4.01 min/day 5.83 (1.32)*** 3.25 to 8.41 −1.81 (1.82) −5.38 to 1.76 0.32
   C +5.83 min/day
  PC weekend I +6.06 min/day 12.49 (2.14)*** 8.29 to 16.69 −6.43 (2.98)* −12.27 to -0.59 0.03
   C +12.49 min/day
  Quiet play week I −2.76 min/day −4.39 (3.24) −10.74 to 1.95 1.64 (4.50) −7.18 to 10.45 0.72
   C −4.39 min/day
  Quiet play weekend I −10.04 min/day −6.65 (7.58) −21.49 to 8.20 −3.39 (10.51) −23.98 to 17.20 0.75
   C −6.65 min/day
MEDIUM SES KINDERGARTENSb
Accelerometer SB weekday I −0.01 % 0.24 (0.85) −1.43 to 1.90 -0.25 (0.99) −2.19 to 1.70 0.81
   C +0.24 %
  SB weekend day I −0.33 % -0.14 (1.52) −3.11 to 2.84 -0.19 (1.78) −3.68 to 3.29 0.91
   C +0.14 %
  Total SB I +0.03 % 0.13 (0.83) −1.50 to 1.76 -0.10 (0.97) −2.01 to 1.81 0.92
   C +0.13 %
  SB school hours I −1.30 % -1.21 (1.01) −3.19 to 0.78 -0.10 (1.19) −2.42 to 2.23 0.94
   C −1.21 %
  SB after school hours I +0.16 % −0.12 (1.30) −2.67 to 2.43 0.28 (1.52) −2.71 to 3.26 0.86
   C −0.12 %
Questionnaire TV week I +1.66 min/day 1.95 (3.49) −4.89 to 8.78 −0.29 (4.25) −8.61 to 8.04 0.94
   C +1.95 min/day
  TV weekend I −0.98 min/day 7.79 (5.37) −2.74 to 18.31 −8.76 (1.79) −21.62 to 4.09 0.18
   C +7.79 min/day
  PC week I +6.25 min/day 5.38 (2.74)* 0.01 to 10.75 0.86 (3.34) −5.68 to 7.41 0.80
   C +5.38 min/day
  PC weekend I +10.45 min/day 7.39 (3.47)* 0.58 to 14.19 3.07 (4.23) −5.23 to 11.36 0.47
   C +7.38 min/day
  Quiet play week I +3.08 min/day −7.67 (4.50) −16.49 to 1.15 10.75 (5.49) −0.01 to 25.51 0.05
   C −7.67 min/day
  Quiet play weekend I −0.51 min/day −12.44 (7.93) −27.98 to 3.09 11.93 (9.66) −6.99 to 30.86 0.22
   C −12.44 min/day
HIGH SES KINDERGARTENSc
Accelerometer SB weekday I −0.42 % 3.24 (1.61)* 0.08 to 6.40 −4.20 (1.93)* −7.98 to -0.43 0.03
   C +3.24 %
  SB weekend day I −1.54 % −1.49 (1.35) −4.13 to 1.15 −0.05 (1.61) −3.21 to 3.11 0.98
   C −1.49 %
  Total SB I −1.14 % 1.85 (1.40) −0.89 to 4.60 −2.99 (1.68) −6.28 to 0.30 0.08
   C +1.85 %
  SB school hours I −2.00 % 0.48 (1.03) −1.54 to 2.49 -2.48 (1.23)* −4.88 to -0.07 0.04
   C +0.47 %
  SB after school hours I −1.51 % −0.06 (1.64) −3.27 to 3.16 -1.45 (1.96) −5.30 to 2.39 0.46
   C −0.06 %
Questionnaire TV week I −2.25 min/day −2.62 (3.06) −8.62 to 3.38 0.37 (4.00) −7.48 to 8.22 0.93
   C −2.62 min/day
  TV weekend I −3.35 min/day 7.04 (4.50) −1.79 to 15.87 −10.39 (5.88) −21.92 to 1.14 0.08
   C +7.04 min/day
  PC week I +4.07 min/day 6.19 (1.58)*** 3.10 to 9.27 −2.11 (2.06) −6.15 to 1.93 0.31
   C +6.19 min/day
  PC weekend I +7.98 min/day 12.04 (2.47)*** 7.20 to 16.87 −4.05 (3.23) −10.39 to 2.28 0.21
   C +12.04 min/day
  Quiet play week I −3.15 min/day −1.98 (4.79) −11.37 to 7.42 −1.18 (6.28) −13.49 to 11.13 0.85
   C −1.98 min/day
  Quiet play weekend I −18.28 min/day −3.48 (8.10) −19.35 to 12.39 −14.81 (10.57) −35.52 to 5.91 0.16
   C −3.48 min/day
  1. SB Sedentary Behaviour, TV Television, PC Personal Computer, SE Standard Error, 95 % CI 95 % Confidence Interval, I Intervention group, C Control group, SES Socio-economic status
  2. *p < 0.05, **p < 0.01, ***p < 0.001
  3. aaccelerometer: n = 341 (I = 190; C = 151); questionnaire: n = 678 (I = 338; C = 340)
  4. baccelerometer: n = 274 (I = 173; C = 101); questionnaire: n = 547 (I = 350; C = 197)
  5. caccelerometer: n = 244 (I = 166; C = 78); questionnaire: n = 490 (I = 273; C = 217)