Table 2.
Baseline physical and sociodemographic characteristics, and physiological measures in intervention and control groups in Brazilian students. Florianopolis, SC, Brazil, 2015.
| Variables | IG (n = 247) |
CG (n = 185) |
p-value | All (n = 432) |
Dropout (n = 136) |
p-value |
|---|---|---|---|---|---|---|
| Mean (sd) | Mean (sd) | Mean (sd) | Mean (sd) | |||
| Age (years) † | 12.4 (1.3) | 12.7 (1.3) | 0.052 | 12.6 (1.3) | 12.8 (1.4) | 0.084 |
| Body mass (kg) * | 47.7 (11.3) | 50.2 (12.4) | 0.047 | 48.8 (11.8) | 52.9 (13.4) | 0.002 |
| Height (cm) * | 155.5 (9.8) | 156.6 (9.9) | 0.237 | 156.0 (9.8) | 157.8 (9.8) | 0.082 |
| TR+SE (mm) * | 22.5 (11.5) | 24.4 (11.5) | 0.042 | 23.3 (11.6) | 26.9 (13.3) | 0.004 |
| MVPA school (min) | 10.8 (6.6) | 10.4 (6.6) | 0.499 | 10.8 (6.6) | 10.1 (5.6) | 0.833 |
| PA general (min) † | 688.6 (913.2) | 648.2 (831.3) | 0.935 | 671.0 (877.7) | 572.4 (902.6) | 0.029 |
| Attendance PE lessons (%) † | 83.8 (13.3) | 92.0 (8.3) | <0.001 | 87.3 (12.2) | 72.4 (23.4) | <0.001 |
| Minutes * | 3.4 (1.8) | 3.0 (1.7) | 0.009 | 3.2 (1.8) | 2.9 (1.5) | 0.093 |
| Laps * | 26.4 (16) | 22.8 (13.9) | 0.013 | 24.8 (15.2) | 21.9 (12.3) | 0.077 |
| Stages † | 3.8 (1.9) | 3.3 (1.7) | 0.007 | 3.6 (1.8) | 3.2 (1.5) | 0.134 |
| VO2max (mL/(kg·min) * | 41.7 (4.8) | 40.0 (4.6) | <0.001 | 41.0 (4.8) | 40.0 (4.5) | 0.075 |
| % (n) | % (n) | p-value ** | % (n) | % (n) | p-value ** | |
| Sex | 0.769 | 0.833 | ||||
| Male | 47.4 (117) | 45.9 (85) | 46.8 (202) | 47.8(65) | ||
| Female | 52.6 (130) | 54.1 (100) | 53.2 (230) | 52.2 (71)\ | ||
| Socioeconomic Status | 0.190 | 0.385 | ||||
| A + B | 54.0 (129) | 47.5 (86) | 51.2 (215) | 46.7 (57) | ||
| C + D + E | 46.0 (110) | 52.5 (95) | 48.8 (205) | 53.3 (65) | ||
| Sexual maturation†† | 0.705 | 0.067 | ||||
| Prepubescent (S1) | 1.7 (4) | 1.1 (2) | 1.4 (6) | 1.0 (1) | ||
| Pubescent (S2 to S4) | 86.8 (210) | 89.4 (160) | 87.9 (370) | 79.8 (79) | ||
| Postpubescent (S5) | 11.6 (28) | 9.5 (17) | 10.7 (45) | 19.2 (19) |
IG: Intervention group; CG: Control group; sd: Standard deviation; TR+SE: Sum of triceps and subscapular skinfold; PA: Physical activity; MVPA: Moderate to vigorous physical activity measured with an accelerometer; m: Metres; kg: Kilogram; mm: Millimetres; VO2max: Maximum oxygen consumption. S: Stages; † Mann–Whitney test; †† Breasts and genitals; * Independent t student test and ** qui-square test.