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Table 4 Subgroup analysis exploring treatment effects by baseline engagement in physical activity in parks

From: Effectiveness of prescribing physical activity in parks to improve health and wellbeing - the park prescription randomized controlled trial

Outcome measures

Engaged in PA in parks (N = 54)a

Not engaged in PA in parks (N = 91)b

Treatment effect

P-value

Treatment effect

P-value

Primary

 Objective 10 min bouted MVPA (min/week)

43.6 (− 38.6, 125.9)

0.298

−15.9 (− 75.1, 43.3)

0.599

 Objective 10 min bouted MVPA (min/week)*

43.6 (− 18.0, 105.3)

0.165

18.2 (− 26.7, 63.1)

0.427

Secondary

 Physical activity related behaviors

  Accelerometer valid measure period (day)

0.1 (−0.6, 0.7)

0.784

1.0 (0.5, 1.4)

< 0.001

  Average wear duration (hour/day)

0.3 (−1.0, 1.6)

0.641

−0.3 (− 1.3, 0.6)

0.479

  PA volume, ENMO (mg)

1.8 (−3.6, 7.2)

0.511

0.7 (− 3.2, 4.6)

0.740

  Inactivity time, 0–25 mg (hour/week)

−1.5 (−9.5, 6.6)

0.722

0.1 (−5.7, 5.9)

0.982

  Light PA, 25–100 mg (hour/week)

0.6 (− 5.4, 6.5)

0.849

1.6 (−2.7, 5.9)

0.464

  Total MVPA (min/week)

369.3 (− 67.4, 806.1)

0.097

25.9 (− 310.3, 362.1)

0.880

  Recreational MVPA (min/week)**

−22.4 (−97.6, 52.8)

0.560

91.4 (33.5, 149.3)

0.002

  Sedentary time (hour/week)

−6.3 (− 19.2, 6.6)

0.340

−6.1 (− 16.1, 3.9)

0.230

  Time spent in Park (min/month)

66.0 (− 161.7, 293.6)

0.570

198.7 (22.4, 375.0)

0.027

  PA in Park (min/month)

74.5 (− 135.1, 284.1)

0.486

265.3 (104.0, 426.7)

0.001

Mental well-being

 General health from SF-12 (range: 1–5)

−0.3 (− 0.8, 0.1)

0.125

0.1 (− 0.2, 0.5)

0.461

 K10 total (range: 10–50)

0.1 (−2.3, 2.5)

0.923

−1.6 (−3.5, 0.2)

0.085

 WHO5 total (range: 0–100)

− 3.3 (− 14.0, 7.4)

0.547

0.7 (−7.5, 8.8)

0.876

 QoL_physical (range: 0–100)

0.3 (−6.1, 6.8)

0.923

3.2 (−1.7, 8.2)

0.203

 QoL_psychological (range: 0–100)

3.4 (−3.0, 9.8)

0.295

4.5 (−0.4, 9.4)

0.069

 QoL_social (range: 0–100)

−0.0 (−7.1, 7.0)

0.990

4.9 (−0.6, 10.3)

0.079

 QoL_environment (range: 0–100)

−2.7 (−9.3, 4.0)

0.435

4.2 (−0.9, 9.3)

0.110

  1. Note: Treatment effect, the associated 95% CI and P-value are from multiple linear regression model, accounting for the interaction between PPI and baseline engagement in PA in parks
  2. *With two extreme outliers removed in outcome: Objective 10 min bouted MVPA
  3. **Significant interaction between PPI and baseline engagement in PA in parks was found, effect size −113.8 (−209.5, − 18.1) min/week, p = 0.020
  4. aaccelerometer measures: N = 43
  5. baccelerometer measures: N = 83
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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