Were the criteria for inclusion in the sample clearly defined? |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
Were the study subjects and the setting described in detail? |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
Was the exposure measured in a valid and reliable way? |
1 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
Were objective, standard criteria used for measurement of the condition? |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Were confounding factors identified? |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
Were strategies to deal with confounding factors stated? |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
Were the outcomes measured in a valid and reliable way? |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
Was appropriate statistical analysis used? |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |