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Table 4 Longitudinal changes in activity duration between 11y and 13y, overall sample and clusters, LSAC data

From: ‘Social screens’ and ‘the mainstream’: longitudinal competitors of non-organized physical activity in the transition from childhood to adolescence

ActivityANALYTIC SAMPLE (n = 1043)SEGMENT 1 (n = 143)
(‘Social Screens’)		SEGMENT 2 (n = 900)
(‘The Mainstream’)
Mean change (95% CI) (min/day)Effect size (d)Mean change (95% CI) (min/day)Effect size (d)Mean change (95% CI) (min/day)Effect size (d)
Non-organized PA−87.0 (−91.4, −82.5)***−1.19−88.4 (−101.1, −75.8)***−1.16−86.7 (−91.5, −82.0)***− 1.20
Texting/emailing/social media8.7 (6.6, 10.8)***0.2656.4 (44.3, 68.6)***0.771.1 (0.6, 1.6)***0.16
Other internet use4.6 (2.8, 6.4)***0.1532.2 (20.1, 44.2)***0.440.2 (−0.3, 0.7)0.03
Other PAa15.4 (9.6, 21.2)***0.1612.0 (−1.6, 25.6)0.1516.0 (9.6, 22.4)***0.16
Reading for leisure−3.2 (−6.5, 0.0)− 0.06−1.0 (− 10.1, 8.1)− 0.02−3.6 (−7.1, − 0.1)*− 0.07
Watching TV/movies2.9 (−4.7, 10.6)0.02− 18.0 (− 38.0, 2.0)− 0.156.3 (−2.0, 14.5)0.05
Shopping0.2 (−2.3, 2.6)0.002.9 (−5.2, 11.0)0.06−0.3 (− 2.8, 2.3)− 0.01
Music for leisure0.8 (− 1.5, 3.1)0.02−3.5 (− 12.5, 5.5)− 0.061.5 (− 0.8, 3.7)0.04
Electronic gaming2.5 (− 3.0, 8.0)0.03− 24.4 (− 43.3, − 5.4)*− 0.216.7 (1.2, 12.3)*0.08
Homework/study8.8 (5.0, 12.5)***0.144.3 (− 5.9, 14.4)0.079.5 (5.5, 13.4)***0.16
School lessons9.0 (4.6, 13.4)***0.129.2 (−0.5, 18.9)0.169.0 (4.1, 13.8)***0.12
Sleeping/napping−5.6 (−11.7, 0.4)−0.06−15.5 (−33.5, 2.5)− 0.14−4.0 (− 10.4, 2.4)−0.04
Daily living activities11.9 (5.6, 18.2)***0.1216.9 (0.3, 33.6)*0.1711.1 (4.3, 17.9)**0.11
Verbal communication15.4 (11.7, 19.0)***0.2517.6 (8.0, 27.2)***0.3015.0 (11.1, 19.0)***0.25
  1. n number of participants, CI confidence interval
  2. Bold text indicates statistically significant differences: *p < 0.05 **p < 0.01 ***p < 0.001 (paired-samples t-tests)
  3. a.Among the analytic sample, other PA increased from 46.6 min/day at 11 years (95% CI = 43.1, 50.2) to 62.1 min/day at 13 years (95% CI = 57.3, 66.9). This increase was spread fairly uniformly across organized PA (+ 5.2 min/day, 95% CI = 0.8, 9.7), active transport (+ 5.0 min/day, 95% CI = 2.5, 7.6) and active chores/work (+ 5.2 min/day, 95% CI = 2.3, 8.1).
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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