Table 5.
Uni- and multivariable linear regression models.
| Distance | VO2max | ||||||
|---|---|---|---|---|---|---|---|
| Model | Explanatories | Coefficient | 95% CIa | p-value | Coefficient | 95% CIa | p-value |
| Univariable | Physical functioning | 5.13 | 1.12, 9.14 | 0.012* | 0.07 | 0.01, 0.12 | 0.017* |
| Physical role | 0.50 | -1.95, 2.96 | 0.685 | -0.01 | -0.05, 0.02 | 0.453 | |
| Ambient air temperature | 7.25 | -11.17, 25.67 | 0.438 | 0.03 | -0.22, 0.28 | 0.809 | |
| Ambient air humidity | -2.44 | -10.53, 5.66 | 0.553 | 0.01 | -0.10, 0.12 | 0.888 | |
| Sex | 358.27 | 255.56, 460.98 | < 0.001* | 4.23 | 2.80, 5.66 | < 0.001* | |
| Age | 25.14 | -8.29, 58.58 | 0.139 | -1.13 | -1.53, -0.72 | < 0.001* | |
| Multivariableb,c | Physical functioning | 4.67 | 0.97, 8.36 | 0.014* | 0.06 | 0.02, 0.11 | 0.008* |
| Physical role | -0.61 | -2.86, 1.63 | 0.589 | -0.01 | -0.04, 0.02 | 0.425 | |
| Ambient air temperature | 36.65 | -7.34, 80.64 | 0.102 | 0.48 | -0.06, 1.01 | 0.080 | |
| Ambient air humidity | 10.80 | -8.61, 30.21 | 0.273 | 0.14 | -0.10, 0.37 | 0.249 | |
| Sex | 359.28 | 257.96, 460.60 | < 0.001* | 4.36 | 3.13, 5.60 | < 0.001* | |
| Age | 23.51 | -5.26, 52.29 | 0.108 | -1.14 | -1.49, -0.79 | < 0.001* | |
a 95% confidence interval
b Key indicators of the distance regression model: F(6.130) = 10.53, p < 0.001, R2 = 0.327
c Key indicators of the VO2max regression model: F(6.130) = 17.26, p < 0.001, R2 = 0.443
* Statistically significant (p < 0.05)
Cumulative distance (in m) and VO2max (in ml kg-1 min-1) as objectively measured outcome variables and questionnaire scores on physical functioning and physical role as self-reported explanatories in sample 1 from a study carried out in Grand Moutcho school, Agboville, Côte d'Ivoire, in early 2010 [17]. Sample 1 with n = 137 observations (79 boys, 58 girls) includes all children with complete questionnaire, parasitological, clinical and shuttle run test results (see also Figure 1). Ambient air temperature (in°C) and relative humidity (in %) as well as participants sex (reference: female) and age (in years) were included as potential confounders.