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Showing results for "design sample size".

81. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2003_02.pdf
    January 01, 2003 - NIS Sample Design The final sample design is as follows. … | | ----------------------------------------------------- | Died during | Sample … Size | 92344 | | hospitalization | Weighted Size | 460748.768 | | … Manton, "Equivalent Sample Size" and "Equivalent Degrees of Freedom" Refinements for Inference Using … Control language specifies the selection methods, the desired sample size or sampling rate, and other

82. HCUP Nationwide Inpatient Sample Redesign Final Report
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2012_Redesign_report.jsp
    January 01, 2012 - The sample size remains the same: 20 percent of discharges in the universe. … In our study, the overall sample size of 8 million was chosen for conformance with the current NIS design … so that sample size could be ruled out as a factor in comparing the performance among the alternative … An important consideration in reviewing these results is that the sample sizes vary substantially across … Consequently, RME estimates vary across DRGs in part because of the varying sample sizes.

83. HCUP_methods_series_cover.ai (pdf file)
    hcup-us.ahrq.gov/reports/methods/TrendReport2005_1.pdf
    March 19, 2004 - sizes are 20 to 25 times larger than the corresponding NHDS sample sizes. … size. … Also, consistent with the 20 percent hospital sample size, the average discharge weight decreased to … be used, although the analyst might have to normalize the weights to sum to the sample size and provide … Figure 15: NIS Sample Sizes for Affective Disorders, 1988 – 2002 HCUP (4/8/05) 35 Figure

84. Making Healthcare Safer Practices: 9. Reducing Adverse Drug Events in Older Adults (pdf file)
    www.ahrq.gov/sites/default/files/wysiwyg/research/findings/making-healthcare-safer/mhs3/reducing-adverse-drug-1.pdf
    March 01, 2020 - Author, Year Description of Patient Safety Practice Study Design; Sample Size; Patient Population … Author, Year Description of Patient Safety Practice Study Design; Sample Size; Patient Population … ; Sample Size; Patient Population Setting Outcomes: Benefits Outcomes: Harms Implementation … ; Sample Size; Patient Population Setting Outcomes: Benefits Outcomes: Harms Implementation … ; Sample Size; Patient Population Setting Outcomes: Benefits Outcomes: Harms Implementation

85. 2006 05 Nistrendsreport 1988-2004A (pdf file)
    hcup-us.ahrq.gov/reports/methods/2006_05_NISTrendsReport_1988-2004A.pdf
    January 01, 2006 - NIS Sample Sizes for Affective Disorders, 1988–2002 .............................................46 … size. … Also, consistent with the 20 percent hospital sample size, the average discharge weight decreased to … can be used, although the analyst might have to normalize the weights to sum to the sample size and … NIS Sample Sizes for Affective Disorders, 1988–2002 Abbreviation: NIS, National (Nationwide) Inpatient

86. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2017
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2017.jsp
    January 01, 2017 - claims data but that comprises as much as 30 percent of Medicare beneficiaries. 1 The NIS' large sample … size enables analyses of rare conditions, uncommon treatments, and special patient populations. … The new NIS retains a large sample size, which enables analyses of rare conditions, uncommon treatments … size. … This sample size was determined by AHRQ based on their experience with similar research databases.

87. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2016
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2016.jsp
    January 01, 2016 - claims data but that comprises as much as 30 percent of Medicare beneficiaries. 1 The NIS' large sample … size enables analyses of rare conditions, uncommon treatments, and special patient populations. … The new NIS retains a large sample size, which enables analyses of rare conditions, uncommon treatments … size. … This sample size was determined by AHRQ based on their experience with similar research databases.

88. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2018
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2018.jsp
    January 01, 2018 - claims data but that comprises as much as 30 percent of Medicare beneficiaries. 1 The NIS' large sample … size enables analyses of rare conditions, uncommon treatments, and special patient populations. … The new NIS retains a large sample size, which enables analyses of rare conditions, uncommon treatments … size. … This sample size was determined by AHRQ based on their experience with similar research databases.

89. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2019
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2019.jsp
    January 01, 2019 - claims data but that comprises as much as 30 percent of Medicare beneficiaries. 1 The NIS' large sample … size enables analyses of rare conditions, uncommon treatments, and special patient populations. … The new NIS retains a large sample size, which enables analyses of rare conditions, uncommon treatments … size. … This sample size was determined by AHRQ based on their experience with similar research databases.

90. Distribution of Temperatures for Low Birth Weight Neonates (pdf file)
    www.ahrq.gov/sites/default/files/wysiwyg/pqmp/measures/acute/chipra-118-fullreport.pdf
    October 01, 2016 - Interquartile range (for sample size >=5) b. Standard deviation (for sample size >=10) 3. … (for sample size >=20) c. 90th percentile (for sample size >=10) 4. … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … sizes.

91. Future Research Needs for Diagnosis of Obstructive Sleep Apnea (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/sleep-apnea-diagnosis-future_research.pdf
    February 01, 2012 - Sample Size Estimates for Various Clinical Scenarios of Sensitivity and Specificity With an Assumed … Multivariable analyses would need larger sample sizes than univariable analyses to reach the same statistical … With the very low rates of postoperative complications, the required sample sizes range from 2,000 to … If we reduce the power to 80 percent, the range of sample sizes is still large, ranging from 1,500 to … We performed exploratory power calculations to obtain approximate estimates of sample sizes for a nested

92. CAHPS Survey Design and Administration | Agency for Healthcare Research and Quality
    www.ahrq.gov/cahps/surveys-guidance/survey-methods-research/index.html
    January 01, 2025 - CAHPS Survey Design and Administration Since the CAHPS program's inception in the mid-1990s, … AHRQ has provided guidance on survey design, sampling, and data collection strategies to ensure that … ways to improve the reliability, validity, and usefulness of CAHPS surveys; best practices in survey design … Recent research by the CAHPS team has focused on survey design, format, and length; the use of incentives … Calculating the starting sample size for CAHPS surveys .

93. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2014
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2014.jsp
    January 01, 2014 - The NIS' large sample size enables analyses of rare conditions, uncommon treatments, and special patient … The new NIS retains a large sample size, which enables analyses of rare conditions, uncommon treatments … a stratum is under-represented in the sampling frame, it will be oversampled to achieve the target sample … size. … This sample size was determined by AHRQ based on their experience with similar research databases.

94. Continuous-Outcomes-Quantitative-Synthesis Methods (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/continuous-outcomes-quantitative-synthesis_methods.pdf
    March 01, 2011 - for sample sizes greater than 25. … be used for sample sizes greater than 70. … Look up the sample size on Table 1 and use the given divisor. … For example, if the sample size is 22, then SD could be estimated as range/3.819. … a sample size of 30 with a SD of 7.53 for the mean difference.

95. HCUP Methods Series Calculating Nationwide Inpatient Sample (NIS) Variances for Data Years 2011 and Earlier
    hcup-us.ahrq.gov/reports/methods/2003_02.jsp
    January 01, 2003 - Top NIS Sample Design The final sample design is as follows. … | | ----------------------------------------------------- | Died during | Sample … Size | 92344 | | hospitalization | Weighted Size | 460748.768 | | … Control language specifies the selection methods, the desired sample size or sampling rate, and other … Manton, " Equivalent Sample Size" and "Equivalent Degrees of Freedom" Refinements for Inference Using

96. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2015
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2015.jsp
    January 01, 2015 - claims data but that comprises as much as 30 percent of Medicare beneficiaries. 3 The NIS' large sample … size enables analyses of rare conditions, uncommon treatments, and special patient populations. … The new NIS retains a large sample size, which enables analyses of rare conditions, uncommon treatments … size. … This sample size was determined by AHRQ based on their experience with similar research databases.

97. 2017-01 (pdf file)
    hcup-us.ahrq.gov/reports/methods/2017-01.pdf
    January 01, 2017 - size in calculating standard errors for certain readmission outcomes that are not population totals … “Equivalent sample size” and “equivalent degrees of freedom” refinements for inference using survey … The standard approach treats stratum sample sizes 𝑛𝑛𝑠𝑠 as random variables. … As such, variance calculations should account for the dependencies; importantly, the effective sample … size will be smaller, because there is inherently less information in correlated (as opposed to uncorrelated

98. Using CAHPS Surveys | Agency for Healthcare Research and Quality
    www.ahrq.gov/cahps/helpful-resources/index.html
    September 01, 2024 - Using CAHPS Surveys CAHPS Survey Design and Administration Review general guidance on CAHPS … survey design and administration to learn how to prepare a survey instrument that meets your needs, … Calculating the starting sample size for CAHPS surveys. 

99. Thermal Condition of Low Birth Weight Neonates Admitted to Level 2 or Higher Nurseries in the First 24 Hours of Life (pdf file)
    www.ahrq.gov/sites/default/files/wysiwyg/pqmp/measures/acute/chipra-119-fullreport.pdf
    May 01, 2018 - Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Designed and tested at this level; some strata may have small sample sizes.

100. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
     hcup-us.ahrq.gov/reports/methods/2015-09.pdf
     January 01, 2015 - .................................................................................... 3 NIS Sample Design … For the NIS data years 2012 and later, the final sample design is as follows. … Although the NIS sample design is not a cluster sample per-se, the sample is stratified on hospital … Discharges were sampled within each stratum at the rate necessary to achieve a sample size equal to … "Equivalent sample size" and "equivalent degrees of freedom" refinements for inference using survey