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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 measuresEngaged in PA in parks (N = 54)aNot engaged in PA in parks (N = 91)b
Treatment effectP-valueTreatment effectP-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)0.16518.2 (− 26.7, 63.1)0.427
Secondary
 Physical activity related behaviors
  Accelerometer valid measure period (day)0.1 (−0.6, 0.7)0.7841.0 (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)0.5110.7 (− 3.2, 4.6)0.740
  Inactivity time, 0–25 mg (hour/week)−1.5 (−9.5, 6.6)0.7220.1 (−5.7, 5.9)0.982
  Light PA, 25–100 mg (hour/week)0.6 (− 5.4, 6.5)0.8491.6 (−2.7, 5.9)0.464
  Total MVPA (min/week)369.3 (− 67.4, 806.1)0.09725.9 (− 310.3, 362.1)0.880
  Recreational MVPA (min/week)**−22.4 (−97.6, 52.8)0.56091.4 (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)0.570198.7 (22.4, 375.0)0.027
  PA in Park (min/month)74.5 (− 135.1, 284.1)0.486265.3 (104.0, 426.7)0.001
Mental well-being
 General health from SF-12 (range: 1–5)−0.3 (− 0.8, 0.1)0.1250.1 (− 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)0.5470.7 (−7.5, 8.8)0.876
 QoL_physical (range: 0–100)0.3 (−6.1, 6.8)0.9233.2 (−1.7, 8.2)0.203
 QoL_psychological (range: 0–100)3.4 (−3.0, 9.8)0.2954.5 (−0.4, 9.4)0.069
 QoL_social (range: 0–100)−0.0 (−7.1, 7.0)0.9904.9 (−0.6, 10.3)0.079
 QoL_environment (range: 0–100)−2.7 (−9.3, 4.0)0.4354.2 (−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