Differences in how vitamin D exposure and outcomes were assessed or differences in the confounders that were taken into account in different studies may have contributed to differences between them.
Although we controlled for important demographic and clinical covariates, we are unable to exclude the possibility that factors other than the type of pain (e.g., the different clinical setting) might have contributed to differences in PD.
In addition, the subgroup of NCA and CA are heterogeneous in itself and include different primary diseases which may have contributed to differences in needs and symptoms.
Different extraction processes and assay methods could have contributed to differences in cinnamaldehyde levels of C. cassia essential oils (Dugoua et al. 2007).
The spectral region that contributed to differences among the HD groups determined from PLS contribution plots is shown in Figure 2.
We investigated if behavioral differences between resident and transient coyotes, the latter potentially interacting with many more individuals across many different packs, and thus potentially at greater risk for pathogen exposure, contributed to differences in exposure risk.
Since OS and RCT participants differed with respect to these factors, these factors could have conceivably contributed to differences between the OSs and the RCTs.
Support for eliminating the tax was nearly as great -- 66 percent -- among people who had strong reasons to favor keeping it: namely, those in families earning less than $50,000 a year who said that the increase in income inequality was a bad thing, that government policy contributed to differences in income, and that the rich pay less than they should in taxes.
Varying temporal resolution of the input datasets also contributed to differences in projected rates of development.
Seed rain contributed to differences in species composition between fields (91%) and distance (76%).
Langmuir monolayers and Brewster angle microscopy demonstrated that varying each head group, acyl chain length and saturation contributed to differences in membrane packing and affected lipid protein associations.
