Discussion
The recently introduced WBQ was employed to enable
the collection of data on water balance in a small sector
of the Greek population, thus providing for the first time
information on water intake from drinking water, bever-ages and solid foods and water loss. Moreover, this information
is supplemented with details on water intake and
loss in summer and winter. It must be noted that the
WBQ was validated during summer in Greece (Malisova
et al., 2012). During this season, people experience
extreme temperature conditions, which are expected to
lead to high values on water intake and loss and, with a
more diverse lifestyle, high variability in water intake and
loss (e.g. during hot days, some stay in an air conditioned
room and some are exposed to sun but, during cold days,
most stay indoors). To use the WBQ for collecting data
during winter, it was hypothesised that, if the WBQ was
able to capture water balance in summer, it would do so
in winter as well.