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1. Kid 1997 Comparison (pdf file)
   hcup-us.ahrq.gov/db/nation/kid/reports/KID_1997_Comparison.pdf
   January 01, 1997 - Significant differences between the KID and NHDS samples are shown in Table 3. … The NIS and NHDS estimates were based on samples, so two-sample t-tests were used. … The KID and NHDS samples record race/ethnicity in different ways. … The two samples are of radically different sizes. … Table 24 compares the sample sizes of the two samples by patient categories.

2. Summary (pdf file)
   hcup-us.ahrq.gov/reports/methods/KIDComp1997Final.pdf
   March 16, 2001 - Significant differences between the KID and NHDS samples are shown in . … The NIS and NHDS estimates were based on samples, so two-sample t-tests were used. … The KID and NHDS samples record race/ethnicity in different ways. … The two samples are of radically different sizes. … Table 24 compares the sample sizes of the two samples by patient categories.

3. MAINTAIN AND EXPAND (pdf file)
   hcup-us.ahrq.gov/reports/methods/1998ChangesintheNISRedesignFinal.pdf
   January 18, 2002 - …………………..39 TABLE 7: COMPARISON OF WEIGHTED ESTIMATES BASED ON 1,000 SAMPLES: BIRTHS……….40 TABLE … 8: COMPARISON OF WEIGHTED ESTIMATES BASED ON 1,000 SAMPLES: MEDICARE (NONBIRTHS)………………………………… … For this analysis we drew 500 samples using the old sampling design with and without the longitudinal … A comparison of each distribution of each 500 samples showed that removing the longitudinal component … We then compared the distribution of estimates from the 1,000 NIS samples.

4. LOINC Overview and Instructions (pdf file)
   hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/mn14.pdf
   November 04, 2014 - Bicarbonate – Bicarbonate may be measured using different methods on different samples. … Glucose – Serum/plasma samples have individual LOINC codes for a full range of random, fasting, and … Whole blood and capillary blood samples have codes only for some of these measurements.

5. LOINC Mapping Tool Instructions (pdf file)
   hcup-us.ahrq.gov/datainnovations/clinicaldata/AppendixK_1LabCodingToolInstructions.pdf
   July 07, 2008 - Bicarbonate – Bicarbonate may be measured using different methods on different samples. … Glucose – Serum/plasma samples have individual LOINC codes for a full range of random, fasting, and … Whole blood and capillary blood samples have codes only for some of these measurements.

6. MAINTAIN AND EXPAND (pdf file)
   hcup-us.ahrq.gov/db/nation/nis/reports/Changes_in_NIS_Design_1998.pdf
   January 01, 1998 - For this analysis we drew 500 samples using the old sampling design with and without the longitudinal … A comparison of each distribution of each 500 samples showed that removing the longitudinal component … selected NIS hospitals, and we drew another 500 samples using the old sampling design without giving … We then calculated the average hospital occupancy rate for each of the 500 samples and compared the … We then compared the distribution of estimates from the 1,000 NIS samples.

7. LOINC Overview and Instructions
   hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/mn14.jsp
   August 01, 2014 - Bicarbonate — Bicarbonate may be measured using different methods on different samples. … Glucose — Serum/plasma samples have individual LOINC codes for a full range of random, fasting, and 2 … Whole blood and capillary blood samples have codes only for some of these measurements.

8. LOINC Mapping Tool Instructions
   hcup-us.ahrq.gov/datainnovations/clinicaldata/AppendixK_1LabCodingToolInstructions.jsp
   October 01, 2010 - Bicarbonate – Bicarbonate may be measured using different methods on different samples. … Glucose – Serum/plasma samples have individual LOINC codes for a full range of random, fasting, and 2 … Whole blood and capillary blood samples have codes only for some of these measurements.

9. C (pdf file)
   hcup-us.ahrq.gov/reports/methods/2010_05.pdf
   January 01, 2010 - mean is just one point estimate out of many point estimates that would arise from different random samples … distribution of sample means that would occur if we calculated sample means from many different random samples … If the sample size is less than the population size then different samples are possible and the standard … It should be noted that the superpopulation model is most often associated with probability samples … simple random sample of the superpopulation, and standard statistical procedures for simple random samples

10. Why the KID should not be used to make State-level estimates
    hcup-us.ahrq.gov/db/nation/kid/kid_statelevelestimates.jsp
    February 01, 2022 - However, these KID samples were not designed to yield a representative sample of hospitals at the State

11. Why the NIS should not be used to make State-level estimates
    hcup-us.ahrq.gov/db/nation/nis/nis_statelevelestimates.jsp
    January 01, 2016 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State

12. Enhancing the Clinical Content of Administrative Data - Laboratory Data Toolkit: Communication Tools
    hcup-us.ahrq.gov/datainnovations/clinicaldata/lvcomm.jsp
    February 01, 2025 - Tools   Laboratory Data Toolkit: Communication Tools Communication tools provide samples

13. Data Acquisition & Transmission (pdf file)
    hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/mn4.pdf
    January 01, 2019 - and assistance as needed 11 Transmission & Analysis of Lab Data • Hospitals will submit a test samples

14. Sample Design
    hcup-us.ahrq.gov/tech_assist/sampledesign/course/index.html
    February 14, 2022 - Sample Design " Enable Javascript support in the browser.

15. HCUP_methods_series_cover.ai (pdf file)
    hcup-us.ahrq.gov/reports/methods/2006_3.pdf
    January 01, 2006 - samples discharges from each of the sampled hospitals. … Table 2 compares the KID, NIS, and NHDS samples. … Second, both the KID and the NHDS are systematic random samples. … Table 6 presents the relative sizes of the KID and NHDS samples. … The two samples are of radically different sizes.

16. HCUP Nationwide Inpatient Sample Design Report 2003
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2003_Design_Report.jsp
    January 01, 2003 - This deviates from the procedure used for earlier samples, which maximized the longitudinal component … This deviates from the procedure used for earlier samples, prior to data year 1998, which maximized the … The two samples can be combined to form a single, generalizable 20% subsample of discharges. … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, see the special report: Design

17. HCUP Nationwide Inpatient Sample Design Report 2004
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2004_Design_Report.jsp
    January 01, 2004 - This deviates from the procedure used for earlier samples, which maximized the longitudinal component … This deviates from the procedure used for earlier samples, prior to data year 1998, which maximized the … The two samples can be combined to form a single, generalizable 20% subsample of discharges. … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, see the special report: Design

18. HCUP Nationwide Inpatient Sample Design Report 2001
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2001_Design_Report.jsp
    January 01, 2001 - This deviates from the procedure used for earlier samples, which maximized the longitudinal component … The two samples can be combined to form a single, generalizable 20% subsample of discharges. … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … Zero-Weight Hospitals Beginning with the 1993 NIS, the NIS samples no longer contain zero-weight … For a description of zero-weight hospitals in the 1988-1992 samples, see the special report: Design

19. HCUP Nationwide Inpatient Sample Design Report 2002
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2002_Design_Report.jsp
    January 01, 2002 - This deviates from the procedure used for earlier samples, which maximized the longitudinal component … This deviates from the procedure used for earlier samples, prior to data year 1998, which maximized the … The two samples can be combined to form a single, generalizable 20% subsample of discharges. … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, see the special report: Design

20. Newsletter Summer 2017
    hcup-us.ahrq.gov/news/newsletters/newsltrQ2_2017.html
    January 01, 2017 - It reflects the amount that a sample statistic's value would fluctuate if a large number of samples … All the HCUP Nationwide Databases are samples and because of this design methodology, standard errors … The HCUP State Databases, however, are not samples, they capture the universe of inpatient and outpatient