Table 1 Play space evaluation scores and the differences between intervention and control schools at 1 year

From: The effect of increasing risk and challenge in the school playground on physical activity and weight in children: a cluster randomised controlled trial (PLAY)

Space a

Control mean (s.d.)

Intervention mean (s.d.)

Mean difference b (95% CI)

P-value

(A) Risk and challenge

 Baseline

3.00 (0.76)

3.25 (0.89)

  

 1 Year

2.88 (0.64)

3.88 (0.64)

1.00 (0.11, 1.89)

0.033

(B) Natural elements

 Baseline

2.88 (0.64)

3.25 (0.89)

  

 1 Year

3.25 (0.71)

3.63 (0.74)

0.38 (−0.06, 0.81)

0.080

(C) Loose parts

 Baseline

1.38 (1.06)

2.50 (0.93)

  

 1 Year

2.88 (0.64)

3.25 (1.16)

0.38 (−0.25, 1.00)

0.197

(D) Wheeled play

 Baseline

1.88 (0.35)

1.63 (0.52)

  

 1 Year

2.38 (1.06)

3.63 (0.92)

1.25 (0.18, 2.32)

0.028

(E) Ball games

 Baseline

2.88 (0.35)

3.50 (0.76)

  

 1 Year

3.38 (0.52)

3.88 (0.35)

0.50 (−0.13, 1.13)

0.104

(F) Socialisation

 Baseline

2.63 (0.52)

3.00 (0.76)

  

 1 Year

3.50 (0.53)

3.88 (0.64)

0.38 (−0.51, 1.26)

0.351

(G) Independent accessibility

 Baseline

2.88 (0.35)

3.38 (1.19)

  

 1 Year

2.88 (0.64)

3.50 (0.76)

0.63 (−0.14, 1.39)

0.095

Overall evaluation

 Baseline

2.63 (0.52)

3.00 (0.53)

  

 1 Year

3.00 (0.53)

3.50 (0.53)

0.50 (0.05, 0.95)

0.033

Summed score (spaces A to G)

 Baseline

17.50 (1.93)

20.50 (3.63)

  

 1 Year

21.13 (3.40)

25.63 (3.70)

4.50 (1.82, 7.18)

0.005

  1. Abbreviation: CI, confidence interval.
  2. aEach area was scored on a scale of 1–5, where 1=very poor, 2=poor, 3=average, 4=good and 5=excellent.
  3. bPaired t-tests accounted for the eight pairs within the 16 primary schools.