Even with existing data, however, more analysis can also shed light on the design of the program.
Even if existing data often suggest a strong link between PPG and LD, both techniques use different optical arrangements, which make a direct comparison of the signals produced difficult [ 45].
In the setting of pregnancy, this is even more difficult, as the existing data is even less complete, and the additional issues concerning the safety of the unborn child need to be considered.
Thus, existing data, even from well-done studies, are inadequate if we want to make extrapolations in any detail or to apply to specific subgroups in the population.
It is moderately well covered by available data, falling roughly in the middle of our 141 coverage estimates; it is thus possible that further information regarding autophagy could be gleaned from existing data, even though few experiments have specifically investigated the process in yeast.
In the developing world, census data is often very costly or even impossible to obtain, and existing data is often very old and outdated.
The resulting growth curves of each zone to be applied in the PH model (Fig. 6) may be compared to existing data sets, even if they cannot be expected to reproduce the growth of a single stand or the forest of a localized area very accurately.
As we reviewed in our opening paper [ 10], existing data support even less of a role for stress, social support, and positive psychological states in the progression and outcome of cancer than for other chronic and life-threatening conditions.
While morbidity and quality-of-life consequences are even less well studied [ 45- 48], existing data suggest acute organ dysfunction may influence the quality of life in sepsis survivors [ 49].
For each question, all existing data were used, even if some participants did not respond to every question.
