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Results from the effect study, analyzed with multilevel models, showed that the intervention was effective in improving algebraic expertise.
Multilevel models showed that linguistic abilities increased from 24 to 36 months of age, but that this increase was stronger in full-term infants.
Multilevel models showed no significant association between income inequality and mortality within 30 days of admission for patients with acute myocardial infarction, heart failure, or pneumonia.
However, the multilevel models showed high C statistics (up to 0.90) indicating good model discrimination between subjects for each level of the outcome.
The multilevel models showed that sociodemographic characteristics, within the level of a GP cooperative catchment area, partly account for the explained variation in contacts between GP cooperatives.
Multiple membership multilevel models showed that the overall adjusted multimorbidity rate was 86% in patients with ≥1 chronic condition, varying from 70% (migraine) to 98% (heart failure), 38% had ≥4 chronic diseases.
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Comparisons of the single-level ordinary least squares (OLS) regression model and the multilevel models show four findings.
Note that tables 1 and 2 are based on the same multilevel models, showing the results of fixed and random parts, respectively.
Figures 1 and 2 show the percentage change in smoking and chewing by education and wealth for men and women reflecting findings from table 1. Tables 2 and 3 present results from pooled multilevel models showing ORs for smoking and chewing by education, wealth, living environment and caste, along with interactions with survey year.
Stepwise multilevel modeling showed that for multilingual pupils, a negative effect of tolerant practices towards multilingualism on same-language friendships existed, while linguistic diversity was of lesser importance.
The results of multilevel modeling showed that after controlling for student characteristics and class-level variables, extension homework positively impacted students' mathematics achievement, while practice and preparation homework did not.
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