The phrase "and considerable variations in" is correct and usable in written English.
It can be used when discussing differences or changes in a particular context, such as data, opinions, or characteristics.
Example: "The study revealed significant trends and considerable variations in the participants' responses to the survey."
Alternatives: "and significant differences in" or "and notable discrepancies in".
The analytical framework was useful to identify similarities and considerable variations in service availability and linking approaches across the countries.
Our study revealed some similarities and considerable variations in HIV service availability, linking approaches and performance monitoring across the study countries.
Further information is shown in the Additional files 3 and 4. Overall, we found a high prevalence of multimorbidity in this sample of a Swiss community-dwelling elderly population, and considerable variations in health care utilization and health care costs in individuals with and without multiple chronic conditions.
It should be borne in mind that the majority of clinical studies have been retrospective, and considerable variations in hormone replacement regimes, as well as the duration of the period of hypo-estrogenicity in the women studied are likely to represent confounding factors in interpretation of study data (Wise et al., 2005).
Asthma in older children: There is high use of asthma inhalers in childhood and considerable variation in treatment regimes and differences in the range of inhalers available.
However, there remains unexplained phenotypic variation and considerable variation in BP among individuals with similar levels of adiposity.
Melittin-selected bacteria showed striking interpopulation variability in resistance in vitro, and considerable variation in the numbers of bacteria recovered from beetles.
Furthermore, we show that such an age- and size-dependent sex role choice could occur in the wild, given the overlapping generations and considerable variation in body size.
Attempting to apply universal ethical principles to genomic research in a multicultural world with diverse healthcare systems and considerable variation in standards of healthcare presents yet another challenge.
Additionally, there are no uniform U.S. clinical practice guidelines for metformin use in kidney impairment and considerable variation in recommendations worldwide [ 18].
In addition, most results are based on small sample sizes and considerable variation in the instruments used to assess psychosocial variables.
