5 quantitative research studies in nursing

5 quantitative research studies  in nursing  most be :

-published  with last 5 years

-Relevant to nursing 

-uses quantitative methodology

-use one or a combination  of statistical test to analyse data: pearson correlation, simple linear  regression , multiple lienar regression, T-test,Mann-whitney U test, chi square , wilconxon, ANOVA or ANCOVA