| Hu Chunyan,Hu Liangping,Reasonably carry out mean value comparison： MANOVA of the quantitative data collected from single factor two-level and multi-level design[J].SICHUAN MENTAL HEALTH,2023,36(S1):30-36 |
| Reasonably carry out mean value comparison： MANOVA of the quantitative data collected from single factor two-level and multi-level design |
DOI：10.11886/scjsws20230319002 |
| English keywords:Single factor multilevel design Covariate Multivariate analysis of variance Multivariate analysis of covariance Pairwise comparison |
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| The purpose of the paper was to introduce the basic concepts， calculation methods， two medical examples and SAS implementation related to the multivariate analysis of variance （MANOVA） for the quantitative data with single factor two-level and multi-level design. Basic concepts included experimental factors and attribute factors， analysis of variance and covariance， independent variables and covariates， matrix and determinant. Calculation methods involved the general statistics， four MANOVA test statistics and pairwise comparison of multiple mean vectors. The two medical examples were measurement results of quantitative indicators related to patients before taking offline under two types of offline modes and investigation data on growth and development of 8-year-old boys in three different types of areas. With the help of SAS software， the multivariate analysis of variance and covariance were carried out on the quantitative data in the two cases， and how to reasonably select covariates was explained and discussed. |
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