Table 2.
Multivariable General Linear Models Evaluating the Association of Physical Activity and Screen-based Sedentary Behavior and Demographic Factors and Physical Fitness.
| Physical fitness test | Demographic characteristics |
Boys (n
=
5,047) β (95% CI) |
Girls (n
=
4,955) β (95% CI) |
||
|---|---|---|---|---|---|
| 50-m sprint (s) | BMI | 0.039 (0.028, 0.028)** |
F = 38.500 R2 = 0.069 |
0.019 (0.011, 0.028)** |
F = 13.617 R2 = 0.025 |
| SES (moderate vs. low) | −0.069 (−0.173, 0.035) | −0.081 (−0.165 to 0.002) | |||
| SES (high vs. low) | −0.061 (−0.168 to 0.046) | −0.232 (−0.32 to −0.145)** | |||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | 0.452 (0.282, 0.621)** | 0.537 (0.388, 0.686)** | |||
| C/V use (≥3 h vs. <3 h) | −0.096 (−0.242 to 0.05) | −0.059 (−0.207 to 0.09) | |||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | −0.066 (−0.173 to 0.04) | −0.015 (−0.1 to 0.07) | |||
| Regular exercise (1–2 times pw vs. <1 time pw) | −0.11 (−0.237 to 0.017) | −0.098 (−0.196 to 0.001) | |||
| Regular exercise (3–4 times pw vs. <1 time pw) | −0.096 (−0.247 to 0.054) | −0.131 (−0.255 to −0.007)* | |||
| Regular exercise (≥5 times pw vs. <1 time pw) | −0.178 (−0.338 to −0.019)* | −0.215 (−0.355 to −0.074)** | |||
| Standing long jump (cm) Sit and reach (cm) |
BMI | −1.239 (−1.434 to −1.043)** | F = 226.410 R2 = 0.309 | −0.312 (−0.452 to −0.172)** |
F = 49.639 R2 = 0.090 |
| SES (moderate vs. low) | 2.591 (0.807, 4.375)** | 1.453 (0.054, 2.853)* | |||
| SES (high vs. low) | 3.007 (1.168, 4.845)** | 2.139 (0.669, 3.609)** | |||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | −4.562 (−7.469 to −1.656)** | −1.157 (−3.658, 1.344) | |||
| C/V use (≥3 h vs. <3 h) | 1.106 (−1.406 to 3.618) | 0.302 (−2.189 to 2.794) | |||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | 1.475 (−0.353 to 3.302) | 1.504 (0.078, 2.93)* | |||
| Regular exercise (1–2 times pw vs. <1 time pw) | 3.461 (1.278, 5.645)** | 0.954 (−0.699 to 2.607) | |||
| Regular exercise (3–4 times pw vs. <1 time pw) | 3.284 (0.702, 5.866)* | 0.124 (−1.961 to 2.209) | |||
| Regular exercise (≥5 times pw vs. <1 time pw) | 3.782 (1.046, 6.517)** | 2.737 (0.386, 5.089)* | |||
| BMI | −0.101 (−0.168 to −0.035)** |
F = 4.881 R2 = 0.008 |
−0.008 (−0.058 to 0.042) |
F = 7.099 R2 = 0.012 |
|
| SES (moderate vs. low) | 0.275 (−0.334 to 0.883) | −0.32 (−0.823 to 0.183) | |||
| SES (high vs. low) | 0.211 (−0.416, 0.839) | 0.142 (−0.387 to 0.67) | |||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | 0.059 (−0.932 to 1.05) | −1.173 (−2.072 to −0.274)* | |||
| C/V use (≥3 h vs. <3 h) | −0.514 (−1.371 to 0.342) | 0.654 (−0.241 to 1.55) | |||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | −0.39 (−1.013 to 0.233) | 0.128 (−0.385 to 0.64) | |||
| Regular exercise (1–2 times pw vs. <1 time pw) | 0.013 (−0.732 to 0.757) | 0.33 (−0.264 to 0.924) | |||
| Regular exercise (3–4 times pw vs. <1 time pw) | −0.03 (−0.91 to 0.851) | 0.429 (−0.321 to 1.178) | |||
| Regular exercise (≥5 times pw vs. <1 time pw) | 0.964 (0.031, 1.897)* | 0.987 (0.142, 1.833)* | |||
| 1,000-m run (min) | BMI | 0.052 (0.046, 0.058) | F = 122.893 R2 = 0.195 | ||
| SES (moderate vs. low) | −0.072 (−0.13 to −0.014)* | ||||
| SES (high vs. low) | −0.099 (−0.158 to −0.039)** | ||||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | 0.107 (0.013, 0.201)* | ||||
| C/V use (≥3 hvs. <3 h) | −0.032 (−0.113 to 0.05) | ||||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | −0.082 (−0.142 to −0.023)** | ||||
| Regular exercise (1–2 times pw vs. <1 time pw) | −0.16 (−0.23 to −0.089)** | ||||
| Regular exercise (3–4 times pw vs. <1 time pw) | −0.131 (−0.215 to −0.047)** | ||||
| Regular exercise (≥5 times pw vs. <1 time pw) | −0.19 (−0.279 to −0.102)** | ||||
| 800-m run (min) | BMI | 0.023 (0.018,0.027)** | F = 42.410 | ||
| SES (moderate vs. low) | −0.084 (−0.128,−0.041)** | ||||
| SES (high vs. low) | −0.053 (−0.099,−0.008)* | ||||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | 0.149 (0.072,0.227)** | ||||
| C/V use (≥3 h vs. <3 h) | 0.03 (−0.047,0.107) | ||||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | −0.032 (−0.077,0.012) | ||||
| Regular exercise (1–2 times pw vs. <1 time pw) | −0.054 (−0.105,−0.002)* | ||||
| Regular exercise (3–4 times pw vs. <1 time pw) | −0.076 (−0.14,−0.011)* | ||||
| Regular exercise (≥5 times pw vs. <1 time pw) | −0.16 (−0.233,−0.087)** | ||||
| Pull-ups (reps) | BMI | −0.164 (−0.209 to −0.118)** | F = 15.258 R2 = 0.028 | ||
| SES (moderate vs. low) | 0.041 (−0.376 to 0.459) | ||||
| SES (high vs. low) | 0.595 (0.165 to 1.025)** | ||||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | 0.183 (−0.497 to 0.863) | ||||
| C/V use (≥3 h vs. <3 h) | −0.285 (−0.872 to 0.303) | ||||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | 0.466 (0.039, 0.894)* | ||||
| Regular exercise (1–2 times pw vs. <1 time pw) | −0.036 (−0.547 to 0.474) | ||||
| Regular exercise (3–4 times pw vs. <1 time pw) | −0.114 (−0.718 to 0.49) | ||||
| Regular exercise (≥5 times pw vs. <1 time pw) | 0.934 (0.294 to 1.574)** | ||||
| Bent-leg sit-ups (reps) | BMI | −0.041 (−0.109 to 0.027) | |||
| SES (moderate vs. low) | 1.915 (1.236, 2.594)** | ||||
| SES (high vs. low) | 3.204 (2.491, 3.918)** | ||||
| Screen-based SB | |||||
| TV (≥3 h vs. <3 h) | −1.383 (−2.597 to 0.169)* | ||||
| C/V use (≥3 h vs. <3 h) | 0.098 (−1.111 to 1.307) | ||||
| Physical activity | |||||
| Physical activity (Active vs. Inactive) | 1.07 (0.378, 1.762)** | ||||
| Regular exercise (1–2 times pw vs. <1 time pw) | 0.19 (−0.612 to 0.992) | ||||
| Regular exercise (3–4 times pw vs. <1 time pw) | −0.152 (−1.164 to 0.859) | ||||
| Regular exercise (≥5 times pw vs. <1 time pw) | 0.651 (−0.49 to 1.792) | ||||
BMI, Body Mass Index; SES, socioeconomic status; Screen-based SB, Screen-based sedentary behavior; TV, Television viewing; C/V use, Computer/videogame use; pw: per week. Data are presented as β coefficient (95% CI). *0.05, **0.01. The model was adjusted for age, BMI, socioeconomic status, physical activity and screen-based sedentary behavior.