8 The Professional Counselor | Volume 12, Issue 1 statistical test. Finally, we executed two logistic regression models to determine the relationships between the predictor variables and the two outcome variables—suicide ideation and suicide attempt. Descriptive Statistics Table 1 presents the descriptive statistics of the study variables. Although 11,868 students in the 11th grade completed the 2017 OHT survey, data from only 10,703 students were included in the analysis because of recording and data collection errors on those excluded from the analyses, due to missing or incomplete data. Therefore, the descriptive statistics of the study variables reported in the table reflect the data of the 10,703 students applicable for use in the logistic regression model of this study. Given the large sample size, we utilized a p-value threshold of less than 0.01. Table 1 Descriptive Statistics Variable M or %a SD (if applicable) Emotional/Mental Health 2.92 1.22 Felt Sad/Hopeless (Yes) 1.68 0.47 Not Straight 17.0% N/A Non-Binary 5.5% N/A Volunteer 2.38 0.99 Consider Suicide 18.0% N/A Attempt Suicide 6.6% N/A a Some variables were reported as means, and some variables were reported as percentages. Results A binomial logistic regression was conducted to quantify the effects of the individual proxy items measuring the predictor variables of perceived burdensomeness and thwarted belongingness on students experiencing suicide ideation (Research Question 1). All five proxy items were entered into the model for the outcome variable. During the data screening process, two proxy items were eliminated (i.e., non-binary, volunteer), as they did not indicate significant results. Regression results indicated the overall model of the three remaining predictors (emotional/mental health, felt sad/ hopeless, not straight) was statistically reliable in distinguishing between 11th grade students who did not experience suicide ideation and those who did (Nagelkerke R2 = .413; p < .001). As such, the suicide ideation model was deemed statistically significant—X2(5) = 3104.194—with an overall positive predictive value of 85.5%. Of the two proxy items for the perceived burdensomeness variable, both proved to be statistically significant (Table 2). Specifically, increased poor emotional/mental health was related to the increased likelihood and occurrence of suicide ideation. Additionally, participants who reported feeling sad
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