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Table 4 Outcomes by group (adjusted for age, sex, and outdoor free-play duration at follow-up)

From: Impact of scheduling multiple outdoor free-play periods in childcare on child moderate-to-vigorous physical activity: a cluster randomised trial

  Intervention Control Intervention-Control (complete case) Multiple imputation (missing data at both time points)
Baseline N = 161 Follow-up N = 135 Baseline N = 217 Follow-up N = 222 Adjusted difference between groups (95% CI) p-value Adjusted difference between groups (95% CI) p-value
Primary outcome
 Mean daily minutes of physical activity in care (sd.)
  MVPA (ICC-0.09) 58.53 (21.19) 58.70 (20.10) 51.72 (17.39) 52.21 (16.81) 6.11 (0.54– 11.68) 0.04 5.21 (0.59–9.83) 0.03
Secondary outcomes
 Mean daily minutes of physical activity in care (sd.)
  Vigorous PA 23.54 (11.01) 23.06 (10.34) 19.80 (8.50) 19.82 (8.38) 2.59 (−0.91–6.09) 0.13 2.09 (−0.56–4.75) 0.12
  Moderate PA 34.98 (11.35) 35.64 (11.37) 31.92 (9.67) 32.40 (9.42) 3.52 (1.19–5.86) < 0.01 3.12 (0.91–5.33) < 0.01
  Light PA 54.96 (14.17) 55.86 (13.37) 53.27 (11.55) 54.41 (11.70) 2.70 (−2.61–8.01) 0.27 2.44 (−1.56–6.45) 0.23
  Total PA 113.49 (32.19) 114.56 (30.88) 104.99 (26.77) 106.63 (26.09) 8.94 (−1.43–19.31) 0.08 7.75 (−0.38–15.88) 0.06
 Counts per minute in care per day (total child PA in care) (sd.)
  Counts per minute (ICC – 0.10) 196.81 (64.22) 197.06 (61.40) 176.50 (52.24) 178.67 (50.40) 16.95 (−4.63–38.52) 0.11 14.25 (−2.26–30.76) 0.09
 Percentage of wear time in care per day (%) (sd.)
  % MVPA (ICC −0.12) 17.56 (5.96) 17.51 (5.34) 15.27 (4.70) 15.10 (4.33) 1.78 (0.72–2.83) < 0.01 1.57 (0.64–2.49) < 0.001
  1. ICC intra-cluster correlation
  2. p-value < 0.05 is considered significant added