Statistical Analysis and Nurse Essay

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health care centers (PHCC) in Stockholm County, 40 of them were randomly selected using an old-fashioned, non-probability method of basically drawing names from a hat. The author notes, "every PHCC was given a unique number that was written on a paper card and placed in a pot. For transparency, two colleagues independently drew 20 paper cards each, a total of 40." Of these 40, one declined to participate. Therefore, 39 PHCCs were selected, and one nurse from each PHCC served as contact person. The sample size is adequate and actually fairly large for the study. Although unconventional, bias was not introduced by using this method of sample selection, and the sample can be considered representative of the population given the randomness of the PHCC selection procedure. Eligibility criteria are also clearly identified, as the contact person nurse needed to comply with the study design, namely to distribute anonymous questionnaires to colleagues. Informed consent was acquired during the selection procedure, and the rights of the subjects were insured by coding the questionnaires.

7. Data Collection

Data collection instructions are clearly identified, and include the initial questionnaire and follow-up interview. These methods are appropriate for the problem being studied, which was to measure preparedness. All subjects received the same questionnaire, so there was no internal validity problem.

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The instruments were designed specifically for this study, to measure exposure to intimate partner violence. Instrument validity is limited, but the questions are clearly outlined to ensure test reliability.

8. Data Analysis

The researchers use STATA 9.0 for statistical analysis and descriptive statistic acquisition. Frequency tables were garnered from the software. A Pearson's chi-square test was used with p-value of

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