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Showing results for "design sample size".

21. C:\HCUP\NIS_1997_Design_Report.wpd (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1997_Design_Report.pdf
    January 01, 1997 - The target sample size was 20 percent of the total number of community hospitals in the U.S. for 1997 … This sample size was determined by AHCPR based on their experience with similar research databases. … sizes yield good estimates. … This was seven hospitals more than the target sample size of 147. 30 November 1999 Design of the … "Equivalent Sample Size" and "Equivalent Degrees of Freedom" Refinements for Inference Using Survey Weights

22. Summary (pdf file)
    hcup-us.ahrq.gov/reports/methods/KIDComp1997Final.pdf
    March 16, 2001 - ............21 Table 21: Sample Sizes – By Hospital Strata, 1997 .................................. … Sample sizes are evaluated for each of the comparisons that follow. … Table 24 compares the sample sizes of the two samples by patient categories. … NHDS estimates may be affected by small sample sizes ( ). … These length-of-stay differences may be due to restricted NHDS sample size and differences in the types

23. Kid 1997 Comparison (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/reports/KID_1997_Comparison.pdf
    January 01, 1997 - ......... 21 Table 21: Sample Sizes – By Hospital Strata, 1997 ..................................... … Sample sizes are evaluated for each of the comparisons that follow. … Table 24 compares the sample sizes of the two samples by patient categories. … NHDS estimates may be affected by small sample sizes (Table 32). … These length-of-stay differences may be due to restricted NHDS sample size and differences in the types

24. HCUP_methods_series_cover.ai (pdf file)
    hcup-us.ahrq.gov/reports/methods/2006_3.pdf
    January 01, 2006 - KID and NHDS Sample Sizes by Region, 2003 Sample Size (Unweighted Records) Region KID NHDS Relative … KID and NHDS Sample Sizes by Hospital Strata, 2003 Sample Size (Unweighted Records) Control and Size … KID and NHDS Sample Sizes by Diagnosis Category, 2003 Sample Size (Unweighted Records) Diagnosis … KID and NHDS Sample Sizes by Rare Diagnosis Category, 2003 Sample Size (Unweighted Records) Diagnosis … KID and NHDS Sample Sizes by Procedure Category, 2003 Sample Size (Unweighted Records) Procedure

25. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2001_Design_Report.pdf
    January 01, 2001 - This sample size was determined by AHRQ based on their experience with similar research databases. … sizes yield good estimates. … This was two more than the target sample size of 134 hospitals, resulting in a surplus of two hospitals … We sampled more than the target number of hospitals in each region because we rounded the target sample … size for each stratum up to the next highest integer whenever it was not an integer.

26. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2005_Design_Report.pdf
    January 01, 2005 - This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield reliable estimates … This was four more than the target sample size of 134 hospitals, resulting in a surplus. … We sampled more than the target number of hospitals in each region because we rounded the target sample … size for each stratum up to the next highest integer whenever it was not an integer.

27. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2004_Design_Report.pdf
    January 01, 2004 - This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield good estimates … This was four more than the target sample size of 131 hospitals, resulting in a surplus. … We sampled more than the target number of hospitals in each region because we rounded the target sample … size for each stratum up to the next highest integer whenever it was not an integer.

28. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2002_Design_Report.pdf
    January 01, 2002 - This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield good estimates … This was three more than the target sample size of 133 hospitals, resulting in a surplus of three hospitals … We sampled more than the target number of hospitals in each region because we rounded the target sample … size for each stratum up to the next highest integer whenever it was not an integer.

29. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2003_Design_Report_Edited_012506.pdf
    January 01, 2003 - This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield good estimates … This was three more than the target sample size of 131 hospitals, resulting in a surplus of three hospitals … We sampled more than the target number of hospitals in each region because we rounded the target sample … size for each stratum up to the next highest integer whenever it was not an integer.

30. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/reports/CalculatingKIDVariances.pdf
    December 16, 2005 - SE Mean 216.08644 Variable ASTMHA 1 Sample … Size 102095.00000 Weighted Size 173381.79587 Total 23.65412 Lower 95% Limit … Manton, "Equivalent Sample Size" and "Equivalent Degrees of Freedom" Refinements for Inference Using … For the sample selection procedure, the sample design can be a complex multistage sample design that … Control language specifies the selection methods, the desired sample size or sampling rate, and other

31. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2005-07.pdf
    January 01, 2005 - SE Mean 216.08644 Variable ASTMHA 1 Sample … Size 102095.00000 Weighted Size 173381.79587 Total 23.65412 Lower 95% Limit … Manton, "Equivalent Sample Size" and "Equivalent Degrees of Freedom" Refinements for Inference Using … For the sample selection procedure, the sample design can be a complex multistage sample design that … Control language specifies the selection methods, the desired sample size or sampling rate, and other

32. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2020
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2020.jsp
    January 01, 2020 - data but that comprises as much as 34 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.

33. 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

34. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2021
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2021.jsp
    January 01, 2021 - comprises as much as 46 percent of eligible Medicare beneficiaries in 2021. 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.

35. 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

36. 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

37. 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.

38. 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.

39. 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.

40. 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.