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Table 2
Logistic regression models of current methylphenidate use, diagnosed emotional disorder and functional impairment, household population aged 6 to 11, Canada excluding territories, 1994/1995

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Standard table symbols

Characteristics Current methylphenidate use Diagnosed emotional disorder Impairment in academic, social or family functioning
beta Standard deviation P value beta Standard deviation P value beta Standard deviation P value
Hyperactivity/Inattention Scale (continuous) 0.30 0.02 < 0.0001 0.31 0.02 < 0.0001 0.29 0.01 < 0.0001
Male sex 0.52 0.10 < 0.0001 ... ... ... ... ... ...
Age (years) 0.13 0.04 0.0046 0.26 0.05 < 0.0001 0.16 0.03 < 0.0001
Low household income ... ... ... 0.32 0.09 0.0002 0.39 0.05 < 0.0001
beta coefficient of parameter
... not applicable
Notes: Multivariable regression models chosen by backwards selection. Model chosen using backwards selection with p < 0.01 to stay and p < 0.10 to go. Best model chosen using -2 Log Likelihood statistic and Hosmer/Lemeshow Goodness-of-Fit tests.
Source: 1994/1995 National Longitudinal Survey of Children and Youth.