Table 3.
Subgroup analyses for studies reporting sedentary time outcomes
| 95% CIs |
Heterogeneity within subgroups |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subgroup* | Number of studies | Mean difference (min/day) | Lower | Upper | Z | p Value | χ2 | I2 (%) | p Value |
| Duration of intervention | |||||||||
| Short (<6 months) | 4 | −20.71 | −44.73 | 3.32 | 1.69 | 0.09 | 132.70 | 98 | <0.00001 |
| Long (≥6 months) | 3 | −10.97 | −22.60 | 0.67 | 1.85 | 0.06 | 17.00 | 88 | 0.0002 |
| Behaviours targeted | |||||||||
| Targeted PA alone | 3 | −31.90 | −56.88 | −6.92 | 2.50 | 0.01 | 68.15 | 97 | <0.00001 |
| Targeted PA and SB | 4 | −6.22 | −12.78 | 0.35 | 1.86 | 0.06 | 12.65 | 76 | 0.005 |
| Sedentary cut point | |||||||||
| Low cut point† | 3 | −5.74 | −13.95 | 2.46 | 1.37 | 0.17 | 8.23 | 76 | 0.02 |
| High cut point‡ | 4 | −29.54 | −52.89 | −6.19 | 2.48 | 0.01 | 134.85 | 98 | <0.00001 |
*Subgroup analyses for behaviours age and setting not performed for sedentary time outcomes due to lack of variability in studies.
†Low cut points included Evenson sedentary cut point: ≤15 counts/15 s, Pfeiffer sedentary cut point: <38 counts/15 s, and De Bock sedentary cut points: boys <46 counts/15 s.
‡High cut point included Sirard sedentary cut points: 3 years ≤301 counts/15 s, 4 years ≤363 counts/15 s, 5 years ≤398 counts/15 s.
PA, physical activity; SB, sedentary behaviour.