Optimum strata boundaries and sample sizes in health surveys using auxiliary variables.
Using convenient stratification criteria such as geographical regions or other natural conditions like age, gender, etc., is not beneficial in order to maximize the precision of the estimates of variables of interest. Thus, one has to look for an efficient stratification design to divide the whole p...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2018-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5886534?pdf=render |
| _version_ | 1818138511921905664 |
|---|---|
| author | Karuna Garan Reddy Mohammad G M Khan Sabiha Khan |
| author_facet | Karuna Garan Reddy Mohammad G M Khan Sabiha Khan |
| author_sort | Karuna Garan Reddy |
| collection | DOAJ |
| description | Using convenient stratification criteria such as geographical regions or other natural conditions like age, gender, etc., is not beneficial in order to maximize the precision of the estimates of variables of interest. Thus, one has to look for an efficient stratification design to divide the whole population into homogeneous strata that achieves higher precision in the estimation. In this paper, a procedure for determining Optimum Stratum Boundaries (OSB) and Optimum Sample Sizes (OSS) for each stratum of a variable of interest in health surveys is developed. The determination of OSB and OSS based on the study variable is not feasible in practice since the study variable is not available prior to the survey. Since many variables in health surveys are generally skewed, the proposed technique considers the readily-available auxiliary variables to determine the OSB and OSS. This stratification problem is formulated into a Mathematical Programming Problem (MPP) that seeks minimization of the variance of the estimated population parameter under Neyman allocation. It is then solved for the OSB by using a dynamic programming (DP) technique. A numerical example with a real data set of a population, aiming to estimate the Haemoglobin content in women in a national Iron Deficiency Anaemia survey, is presented to illustrate the procedure developed in this paper. Upon comparisons with other methods available in literature, results reveal that the proposed approach yields a substantial gain in efficiency over the other methods. A simulation study also reveals similar results. |
| first_indexed | 2024-12-11T10:13:22Z |
| format | Article |
| id | doaj.art-4ca58eeb53df4a0496124738728b272f |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-11T10:13:22Z |
| publishDate | 2018-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-4ca58eeb53df4a0496124738728b272f2022-12-22T01:11:41ZengPublic Library of Science (PLoS)PLoS ONE1932-62032018-01-01134e019478710.1371/journal.pone.0194787Optimum strata boundaries and sample sizes in health surveys using auxiliary variables.Karuna Garan ReddyMohammad G M KhanSabiha KhanUsing convenient stratification criteria such as geographical regions or other natural conditions like age, gender, etc., is not beneficial in order to maximize the precision of the estimates of variables of interest. Thus, one has to look for an efficient stratification design to divide the whole population into homogeneous strata that achieves higher precision in the estimation. In this paper, a procedure for determining Optimum Stratum Boundaries (OSB) and Optimum Sample Sizes (OSS) for each stratum of a variable of interest in health surveys is developed. The determination of OSB and OSS based on the study variable is not feasible in practice since the study variable is not available prior to the survey. Since many variables in health surveys are generally skewed, the proposed technique considers the readily-available auxiliary variables to determine the OSB and OSS. This stratification problem is formulated into a Mathematical Programming Problem (MPP) that seeks minimization of the variance of the estimated population parameter under Neyman allocation. It is then solved for the OSB by using a dynamic programming (DP) technique. A numerical example with a real data set of a population, aiming to estimate the Haemoglobin content in women in a national Iron Deficiency Anaemia survey, is presented to illustrate the procedure developed in this paper. Upon comparisons with other methods available in literature, results reveal that the proposed approach yields a substantial gain in efficiency over the other methods. A simulation study also reveals similar results.http://europepmc.org/articles/PMC5886534?pdf=render |
| spellingShingle | Karuna Garan Reddy Mohammad G M Khan Sabiha Khan Optimum strata boundaries and sample sizes in health surveys using auxiliary variables. PLoS ONE |
| title | Optimum strata boundaries and sample sizes in health surveys using auxiliary variables. |
| title_full | Optimum strata boundaries and sample sizes in health surveys using auxiliary variables. |
| title_fullStr | Optimum strata boundaries and sample sizes in health surveys using auxiliary variables. |
| title_full_unstemmed | Optimum strata boundaries and sample sizes in health surveys using auxiliary variables. |
| title_short | Optimum strata boundaries and sample sizes in health surveys using auxiliary variables. |
| title_sort | optimum strata boundaries and sample sizes in health surveys using auxiliary variables |
| url | http://europepmc.org/articles/PMC5886534?pdf=render |
| work_keys_str_mv | AT karunagaranreddy optimumstrataboundariesandsamplesizesinhealthsurveysusingauxiliaryvariables AT mohammadgmkhan optimumstrataboundariesandsamplesizesinhealthsurveysusingauxiliaryvariables AT sabihakhan optimumstrataboundariesandsamplesizesinhealthsurveysusingauxiliaryvariables |