Although recent cross-sectional research has suggested a positive association between sedentary behaviour and risk of depression, the direction of associations is unclear.
Main Outcome Measures: VFM's characteristics are described using estimates of construct and criterion validity (estimates of the strength and direction of associations between different VFM tasks and between VFM and other medical and nonmedical variables).
It is unclear why findings from the current study and those by Zivin et al. ([2007]) are disparate, given that there is no a priori reason to expect the direction of associations for non-fatal ISH and death from suicide to differ.
Including age potentially could have changed the strength and direction of associations, as in the MetaPlus study we showed that age is a strong independent mortality predictor [7] and our present analysis demonstrates that including age group covariates markedly influences associations between baseline levels and 6-month mortality.
Finally, the cross-sectional study design may not allow us to draw firm conclusions about the causal direction of associations between alcohol and e.g. diabetes.
Lag values indicate the degree and direction of associations.
However, analyses were cross-sectional and the direction of associations could not be established.
Owing to the cross-sectional study design, the data cannot elucidate the causal direction of associations.
Although the direction of associations was similar among women, none of the estimates were statistically significant.
They detected no significant associations with HbA1c or glucose and partially inconsistent direction of associations.
Longitudinal studies are also needed in order to clarify the direction of associations found here.
