Table 2 Baseline characteristics of the Movimente study sample
|  | Control (n = 316) | Intervention (n = 472) |  |
|---|---|---|---|
Variables | mean (SD) or n (%) | mean (SD) or n (%) | p-value |
Sex | 0.582 | ||
 Male | 145 (45.9) | 226 (47.9) |  |
 Female | 171 (54.1) | 246 (52.1) |  |
 Age (years) | 13.13 ± 1.07 | 13.05 ± 1.02 |  |
Grade | 0.833 | ||
 7th grade | 117 (37.0) | 169 (35.8) |  |
 8th grade | 96 (30.4) | 153 (32.4) |  |
 9th grade | 103 (32.6) | 150 (31.8) |  |
SES | 0.100 | ||
 1st tertile | 121 (38.3) | 146 (30.9) |  |
 2nd tertile | 96 (30.4) | 163 (34.5) |  |
 3th tertile | 99 (31.3) | 163 (34.5) |  |
Time per day (min) | |||
TV | 148.07 ± 111.24 | 145.75 ± 102.33 | 0.763 |
 Games | 84.90 ± 115.85 | 110.30 ± 120.81 | 0.003 |
 Computer | 66.04 ± 88.52 | 77.21 ± 96.12 | 0.099 |
 Smartphone | 202.68 ± 128.17 | 217.75 ± 123.25 | 0.098 |
 Screen time | 299.01 ± 207.24 | 333.26 ± 217.39 | 0.028 |
 Screen time w/ smartphone | 501.69 ± 255.99 | 551.00 ± 260.83 | 0.009 |
ST guidelines | 0.135 | ||
  ≥ 2 h | 252 (79.7) | 396 (83.9) |  |
  < 2 h | 64 (20.3) | 76 (16.1) |  |
ST guidelines w/ smartphone | 0.938 | ||
  ≥ 2 h | 307 (97.2) | 459 (97.2) |  |
  < 2 h | 9 (2.8) | 13 (2.8) |  |