Table 4. Interventions’ results.
| Sedentary time | Effect size | Effect |
|---|---|---|
| Martínez-Andrade et al.31: no effect on SB. | Mean difference of screen time -1.6 (95%CI: -4.4–1.1) | NE |
| Andrade et al.33: 18 months - the intervention group lower increased total screen time on a weekend day (β = -25.9min/day; p = 0.03) and in the proportion of adolescents exposed to screen time for > 180min/day; 28 months – greater increases in total screen time on a weekday (β = 21.4min/day; p=0.03) were observed among adolescents from the intervention group. | Mean difference of screen time on a weekday 21.2 min/day (SE :13.3) | P |
| Leme et al.26: the intervention group reduced total sedentary activities on weekends (-0.92hrs/day; p = 0.01) compared to the control group. | P | |
| Guimarães et al.27: the intervention group reduced the total sedentary time (5652.1; sd = 241.4 to 5641.0; sd = 244.7min/week; p = 0.04) and daily sedentary time (1589.22; sd = 76.4 to 1556.0; sd=73.7min/day; p = 0.01) and presented lower mean compared to control group (6333.7; sd = 177.2min/week; p = 0.04 and 1697.16; sd = 55.3min/day; p = 0.01). | Mean difference of total SB -298.9 min/week (SE: 424.4) Mean difference for screen time -55.5 min/day (SE: 406.8) | P |
| Gutiérrez-Martínez et al.34: the intervention group reduced SB in 11.5 (EE = 8.8; MARA+SMS) and in 15.8 (EE = 10.05; MARA) differently from the control group, which has increased SB in 10.9 (EE = 9.07; p = 0.003) min/day. | Mean difference of total SB -22.3 min/day (SE:17.9) | P |
| Rauber et al.29: participants reduced the time spent in sedentary leisure activities by 177 min/weekdays (p = 0.004) and by 41 min/weekends (p = 0.001). | Mean difference of SB -177.1 min/weekdays -41.1 min/weekends | P |
| Sitting time | ||
| Bacardi-Gascon et al.30: reduced from 9.94 (sd = 2.39) to 9.45 (sd = 1.91) hrs/day | Mean difference of sitting time -0.49 min/day (SE :0.1) | P |
| TV-viewing | ||
| Colín-Ramírez et al.32: had no effect on TV time. | Percentage of children with at least 1 hour a day of TV time -4% | NE |
| Bacardi-Gascon et al.30: reduced from 1.84 (sd = 1.17) to 1.69 (sd = 0.90) hrs/day (p = 0.02) | P | |
| Andrade et al.33: 18 months – the intervention group lower increased TV-viewing on a weekday (β = -15.7min/day; p = 0.003) and a weekend day (β = -18.9min/day; p = 0.005); 28 months – Greater increases in TV-viewing (β = 13.1min/day; p = 0.02) were observed among adolescents from the intervention group. | Exposures to total screen time > 2hrs/day Week: OR = 0.94 (95%CI:0.72–1.22) Weekend: OR = 1.05 (95%CI:0.76–1.43) | P |
| Bandeira et al.28: the intervention group reduced the time of TV to less than 2hrs/day (boys: -8.9%; p = 0.005; girls: -7.2%; p = 0.032). Boys in the intervention group had a greater chance to reduce TV use to < 2hrs/day (OR = 2.86; p = 0.037) compared to boys in the control group. | Odds ratio for reducing the use of screens < 2hrs/day Boys: OR = 3.79 (95%CI: 0.5–29.7) Girls: OR = 2.73 (95%CI: 0.5–15.1) | P |
| Video game/computer | ||
| Colín-Ramírez et al.32: 6 months – no effect; 12 months – the intervention group significantly reduced the amount of hours playing video games (23% to 13%; p = 0.001) among children who spent more than 3hrs/day involved in this activity at baseline. This reduction was not observed in the control group (22% to 20%). | P | |
| Hardman et al.25: the proportion of adolescents exposured to video game/computer on weekend days for > 2hrs/day was greater in the control group than in the intervention group (29.8% vs. 35.6%; p = 0.004). After adjusting for potential confounding factors, results were not maintained. | NE | |
| Leme et al.26: the intervention group reduced computer time (-0.63hrs/day; p = 0.02) compared to the control group. | Mean difference for total screen-time Week: -0.19 (SE: 0.3) Weekend: -0.9 (SE: 0.4) | P |
| Bandeira et al.28: girls in the intervention group reduced the time of computer/video game to less than 2hrs/day (-11.03%; p = 0.0.002). Girls and adolescents aged from 11 to 13 in the intervention group had a greater chance to reduce computer/video game use to < 2hrs/day (girls: OR = 3.34; p < 0.001; 11 to 13 years old: OR = 3.08; p = 0.011) compared to the control group. | P |
NE = no effect; P = positive effect – result statistically significant.