Skip to main content

Table 1 Behaviours reported by school children by gender mean (SD) or n (%)

From: Associations between meeting sleep, physical activity or screen time behaviour guidelines and academic performance in Australian school children

  Total nTotalGirlsBoysp-valuea
Sleep% meeting sleep guidelines c828611 (74%)307 (74%)304 (73%).724
Weekday sleep (hrs/night) b8309.0 (1.2)9.1 (1.1)9.0 (1.3).525
Weekend sleep (hrs/night) b8289.7 (1.4)9.8 (1.2)9.6 (1.5).058
Weekday bedtime ≥23:00830101 (12%)51 (12%)50 (12%).915
Weekend bedtime ≥23:00829258 (31%)138 (33%)120 (29%).185
% poor sleeper82983 (10%)30 (7%)53 (13%).052
Physical Activity% meeting guidelines d840174 (21%)60 (14%)114 (27%)<.001
Days getting 60 min MVPA8404.3 (2.1)4.0 (2.0)4.6 (2.2)<.001
Unorganized play (hrs/day)8371.7 (2.0)1.5 (1.8)1.9 (2.3)<.001
% participating in sport838769 (92%)380 (91%)389 (93%).258
Sedentary Behaviours% meeting screen time guidelines e83295 (11%)59 (14%)36 (9%).018
Leisure screen behaviours (hrs/day)83212.1 (15.4)10.0 (11.1)14.2(18.5)<.001
Total sedentary behaviours (hrs/day)83221.4 (19.8)19.9 (15.1)23.0 (23.6).395
Academic scoresAverage Academic Index93367.1 (11.3)68.6 (10.8)65.6 (11.5)<.001
Maths92558.3 (19.7)57.0 (19.0)59.5 (20.1).057
English86470.0 (9.8)73.0 (9.1)67.3 (9.6)<.001
% meeting all 3 guidelines82417 (2%)6 (1%)11 (3%).217
% meeting at least 2/3 guidelines824188 (23%)84 (20%)104 (25%).039
  1. aT test, wilcoxan rank, or chi-squared test for gender differences
  2. bSleep time from reported usual bedtimes and waketimes
  3. cSleep guidelines 9 to 11 h for children 5–13 years and 8 to 10 h for 14–17 year olds
  4. d60 min of physical activity on 7 days per week
  5. escreen time guidelines of less than 2 h of leisure screen activity