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Included suicide-related content, exclusion due to relevance, and attrition in 2005, 2009 and 2012 respectively. P-values based on Fisher’s exact test.
| Material | Year | |||
| 2005 | 2009 | 2012 | P-value | |
| n = 100 | n = 100 | n = 100 | ||
| Included hits | 84 | 48 | 82 | <.01 |
| Exclusion (non-related) | 13 | 46 | 19 | <.01 |
| Exclusion (attrition) | 3 | 6 | 0 | .05 |
