We tested our main model using hand hygiene data from audits 1 through 8 as the outcome variable, and accreditation outcomes, infection control scores, accreditation cycle and peer groups as our explanatory variables.
The following linear regression model is specified to estimate the level and trend in the dependent variable before accreditation and the changes in level and trend following accreditation.
47 48 In our study it gave a strong answer to the multicollinearity issue and did take the accreditation variable into account when constructing PLS2 components.
To take account of this sampling in the statistical analyses, we create indicator variables for hospital ownership categories (private not-for-profit, private for-profit, and government owned) and separate indicator variables for hospital levels of accreditation (jibie levels 1, 2, and 3) to use as explanatory variables in the multi-variate regression analyses (described further below).
Variables of hospital characteristics at the PMV onset included a set of binary variables indicating a hospital's accreditation level and region.
Independent variables included each hospital's accreditation level (AL), ownership (OWN), and the BNHI region (REG) to which it belongs.
In a typical accreditation process many variables are assessed such as team and overall organisational performance, leadership, organisational culture, service or product outcomes, and customer focus.
We are unable to show causation through a randomised controlled trial (that is, between accreditation and the other variables) due to potentially confounding variables; for example, previous exposure to accreditation processes and bias due to self-selection amongst the participating and non-participating health services.
Table 2 displays the segmented regression equations of the time series before and after accreditation for the dependent variables of Initial Medical Assessments (Y 1 ), Initial Nursing Assessments (Y 2 ), Pain Assessments (Y 3 ), and Pain Reassessments (Y 4 ).
Another study investigated variables contributing to the successful implementation of accreditation programs in low and middle income countries [ 22].
