Table 2.
Mental health characteristics according to survey year.
| Year | Suicide Attempt within the Last 12 Months | Suicidal Ideation within the Last 12 Months | Feelings of Sadness or Despair within the Last 12 Months | |||
|---|---|---|---|---|---|---|
| % * | OR (95% CI) † | % * | OR (95% CI) † | % * | OR (95% CI) † | |
| 2008 | 4.7 | 1 | 18.9 | 1 | 38.8 | 1 |
| 2009 | 4.6 | 0.97 (0.90–1.04) | 19.1 | 1.01 (0.97–1.06) | 37.5 | 0.95 (0.91–0.98) |
| 2010 | 5.0 | 1.06 (0.99–1.14) | 19.3 | 1.03 (0.98–1.07) | 37.4 | 0.94 (0.90–0.98) |
| 2011 | 4.3 | 0.90 (0.84–0.97) | 19.6 | 1.04 (1.00–1.09) | 32.8 | 0.77 (0.74–0.80) |
| 2012 | 4.1 | 0.86 (0.80–0.92) | 18.3 | 0.96 (0.92–1.00) | 30.5 | 0.69 (0.67–0.72) |
| 2013 | 4.1 | 0.87 (0.81–0.93) | 16.6 | 0.85 (0.82–0.89) | 30.9 | 0.70 (0.68–0.73) |
| 2014 | 2.9 | 0.61 (0.57–0.66) | 13.1 | 0.64 (0.62–0.67) | 26.7 | 0.57 (0.55–0.60) |
| 2015 | 2.4 | 0.50 (0.47–0.55) | 11.7 | 0.57 (0.54–0.59) | 23.6 | 0.49 (0.47–0.51) |
| 2016 | 2.4 | 0.49 (0.45–0.53) | 12.1 | 0.59 (0.56–0.62) | 25.5 | 0.54 (0.52–0.56) |
| 2017 | 2.6 | 0.54 (0.50–0.58) | 12.1 | 0.59 (0.56–0.62) | 25.1 | 0.53 (0.51–0.55) |
| Average | 3.8 | 16.3 | 31.3 | |||
| Change in OR year by year ‡ | 0.916 (0.911–0.922) | 0.927 (0.923–0.930) | 0.918 (0.915–0.923) | |||
| r ¶ | −0.92 (<0.001) |
−0.91 (<0.001) |
−0.96 (<0.001) |
|||
| s § | −0.31 (<0.001) |
−1.03 (<0.001) |
−1.78 (<0.001) |
|||
* Weighted percentages for complex sampling. † Weighted odds ratio (OR) and 95% confidence interval (CI) for complex sampling. ‡ Average weighted OR and 95% CI of increasing years for complex sampling. ¶ Pearson’s sample correlation coefficient between weighted percentages and years. § The slope of linear regression was assessed to estimate the annual change in weighted percentages. ¶,§ () is the p-value for each estimate.