Fourth, the data were presented differently between studies; for instance, four studies presented the median MVD rather than mean MVD [ 22, 23, 25, 27].
Levels of missing data were also very variable between studies: for instance, data were missing for 77% of Bangladesh data on whether boiled thread was used to tie the cord compared to 32% for Eastern India.
Such studies, for instance, have found no link between the combined measles, mumps and rubella vaccine and autism, and they have found no link between a once-common vaccine additive, thimerosal, and autism.
In our study, for instance, there is an interaction between gender and the medical specialty hierarchy.
A 2016 London School of Economics study, for instance, found that greater income gaps between neighboring U.S. neighborhoods led to more property crime in the richer neighborhoods.
However, the authors also show that estimated returns to schooling vary significantly between studies and contexts; for instance, returns appear to be higher in low-income countries, for women, and for lower levels of schooling.
An analysis of studies published between 1970 and 2011, for instance, found that "core stability exercise was better than general exercise for reducing pain" in chronic low back pain patients.
One of the next steps in disease-gene analysis could be to study connections between diseases; for instance, various types of cancers as they relate to other illnesses such as diabetes [ 58], various infections [ 59], and obesity [ 60, 61].
Mickens studied psychology, for instance, Payne accounting.
Conversely, two trials [ 35, 65] evaluating tube versus oral feeding in symptomatic term and preterm infants found a significantly lower rate of GORs in the tube-fed group; this opposite result might be due to some methodological differences between the studies such as, for instance, the tube size or the removal of the feeding tube during the postprandial period.
A study showed that the association between for instance gender and health care seeking behavior depends on which symptom is researched [ 3, 24].
