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. 2019 Feb 26;19:66. doi: 10.1186/s12887-019-1438-2

Table 1.

Measures of association for the matching factors sex, age and place of residence

Matching factors
Sex Age Place of residence
Measures of association
 Phi coefficient 0.706
 Contingency coefficient 0.577 0.945 0.945
 Cramer’s V 0.706 0.961 0.961
 Pearson correlation coefficient 0.901