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Table 6 Psychosocial and parental indicators of effectiveness at baseline (B) and 4 weeks after the intervention (F1) in the intervention (INT) and comparison (COM) group and the differences in change between the groups from B to F1 with their 95% confidence intervals (95% CI)

From: Kids Out; evaluation of a brief multimodal cluster randomized intervention integrated in health education lessons to increase physical activity and reduce sedentary behavior among eighth graders

 

INT

COM

Between-group difference in change (95% CI)a)

B

F1

B

F1

Psychosocial indicators (Student questionnaire), N

561

585

749

716

INT = 486; COM = 646

Family norm, n (%)

• Walking or cycling to school (more often or as often as now)

265 (47.9)

327 (56.6)

354 (47.9)

372 (52.4)

3.6 (0.5 to 6.6)b)

• Leisure PA (more often or as often as now)

449 (80.2)

448 (77.4)

595 (80.2)

540 (76.2)

−0.4 (−2.4 to 1.6)

• Screen time (sets limitations or hopes for reduce)

328 (59.3)

339 (59.2)

448 (60.7)

379 (53.9)

5.4 (3.3 to 7.4)c)

Short-term behavioral intention, mean (SD)

• Walking or cycling to school (0–5 days)

3.0 (2.3)

2.7 (2.3)

3.0 (2.4)

2.7 (2.4)

0.0 (−0.2 to 0.3)

• Leisure PA (0–7 days)

3.6 (2.0)

3.7 (1.9)

3.5 (1.9)

3.4 (1.9)

0.3 (0.1 to 0.6)

• Exceeding 2 h of screen time (0–7 days)

2.9 (2.2)

2.8 (2.2)

3.0 (2.2)

3.1 (2.2)

−0.1 (− 0.4 to 0.1)

Confidence to execute the short-term intention, n (%)

• Walking or cycling to school (totally or quite confident)

455 (82.4)

482 (84.0)

632 (85.3)

595 (84.2)

2.6 (1.3 to 3.9)

• Leisure PA (totally or quite confident)

518 (92.5)

523 (91.4)

701 (94.2)

640 (90.8)

1.5 (−0.3 to 3.4)

• Reducing screen time if wanted (totally or quite confident)

446 (81.4)

482 (84.8)

618 (84.2)

594 (84.8)

1.5 (0.0 to 3.1)

Parental indicators (Parental questionnaire), N

401

327

558

401

INT = 277; COM = 362

Knowledge about PA recommendations, n (%)

• Correct answer on PAd)

365 (90.8)

303 (92.7)

508 (89.0)

356 (88.8)

1.6 (0.0 to 3.2)

• Cannot say

31 (7.7)

23 (7.0)

59 (10.6)

41 (10.2)

0.0 (−1.6 to 1.7)

Knowledge about screen time recommendations, n (%)

• Correct answere)

326 (83.4)

258 (82.4)

447 (81.4)

289 (77.7)

4.8 (2.3 to 7.2)2)

• Cannot say

12 (3.0)

15 (4.6)

25 (4.4)

30 (7.5)

−0.1 (−2.8 to 2.7)

Family discussions on child’s…, n (%)

• …leisure PA (yes)

283 (70.6)

190 (58.5)

424 (74.3)

217 (55.4)

4.7 (−2.0 to 11.4)

• …school commuting (yes)

114 (28.8)

49 (15.5)

177 (31.3)

63 (16.5)

0.5 (−5.4 to 6.4)

• …on screen time (yes)

271 (67.8)

201 (62.4)

395 (69.1)

244 (61.9)

2.9 (−1.0 to 6.7)

Family efforts to influence on child’s…, n (%)

• …leisure PA (yes)

206 (51.8)

118 (37.9)

280 (48.9)

159 (41.7)

−6.0 (−11.5 to −0.6)

• …walking and cycling to school (yes)

50 (12.8)

28 (9.3)

71 (12.6)

28 (7.7)

−0.5 (−4.3 to 3.4)

• …screen time (yes)

227 (57.8)

182 (57.2)

348 (61.3)

224 (57.6)

0.8 (−2.1 to 3.6)

  1. a)Linear mixed models adjusted for age, sex and baseline value; teacher as random effect. Dichotomous variables were analyzed without adjustments or random effect correction but statistical levels were re-checked with generalized linear mixed models (GLMM) with same adjustments and random effect correction as used in non-dichotomous variables
  2. b)Statistical significance (p < 0.05) did not persist after GLMM
  3. c)Remained statistically significant after GLMM (p < 0.05)
  4. d)All answers ≥60 min a day were considered correct
  5. e)All answers < 2 h a day were considered correct