Instructions for Analyzing Data from CAHPS Surveys
Instructions for Analyzing Data from CAHPS Surveys
Instructions for Analyzing Data from CAHPS Surveys
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<strong>CAHPS</strong> ® <strong>Surveys</strong> and <strong>Instructions</strong><br />
This example follows two paths <strong>for</strong> the analysis of the composite measure Q1 and Q2.<br />
One uses no adjuster variables, Run 1, and the other uses the two adjusters, A1 and<br />
A2, without imputation of missing values of the adjuster’s mean within plan, Run 2.<br />
The macro cleans (making sure the values are within the valid range <strong>for</strong> the given<br />
variable type) the items being analyzed, Q1 and Q2. In the macro call they were<br />
indicated as being a type 3 variable, which means the response values must be a 1, 2,<br />
3, or 4. Any other response value is set to missing. In our small data set (observation<br />
10), Q1 has a value of 7 so it is set to missing; all other values are fine. The adjuster<br />
values are not cleaned in the macro, so all values are accepted.<br />
The first step in the macro that begins to prepare the data <strong>for</strong> the reports is the<br />
“USABLE” section of the macro. This checks <strong>for</strong> missing values in each<br />
observation and determines whether to keep the record based on the macro<br />
arguments. The results may differ depending on whether adjusters are used and<br />
whether missing adjusters get an imputed mean value. The observations that are<br />
dropped <strong>for</strong> Run 1 and Run 2 after the “USABLE” section are noted as follows:<br />
Obs Plan Q1 Q2 A1 A2 Run 1 - No Adj Run 2 - With Adj<br />
1 A 2 4 1 1<br />
2 A 3 . 2 2<br />
3 A 4 2 3 . A2 Missing<br />
4 A 4 3 . . A1 & A2 Missing<br />
5 A 3 3 2 3<br />
6 B 3 3 2 3<br />
7 B . . 4 5 Q1 & Q2 Missing Q1 & Q2 Missing<br />
8 B 2 2 5 4<br />
9 B 3 2 6 3<br />
10 B . 3 3 3<br />
The next few sections of the macro use the records retained <strong>from</strong> the “USABLE”<br />
section, nine records <strong>for</strong> Run 1 and seven records <strong>for</strong> Run 2. These sections<br />
simply report and summarize that data <strong>for</strong> low number of respondents, percent<br />
missing <strong>for</strong> each variable, and the percent breakdown of the response categories. The<br />
next step is to standardize each analysis variable in the data to a mean of zero and<br />
per<strong>for</strong>m the case-mix adjustment if there are adjusters, as in Run 2.<br />
<strong>Instructions</strong> <strong>for</strong> <strong>Analyzing</strong> <strong>Data</strong> <strong>from</strong> <strong>CAHPS</strong> <strong>Surveys</strong><br />
Document No. 2015<br />
Updated 4/2/12<br />
Page 46
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