The multivariate analyses were repeated with added examinations of sex by RA and sex by PA interactions. The results showed a statistically significant interaction of sex and PA with attempt (Figure 1). Post hoc analyses (Holmbeck, 2002) indicated that only men showed a higher likelihood of suicide attempt at increased levels of PA (p<.01), while the slope for women was not significant. As shown in the last columns of Table 1, in the model including the interaction term RA shows a statistically significant association with ideation (1.04, 1.01–1.08, p<.05) and a trend-level association with attempt (1.03, 1.00–1.06, p<.10). We also examined scores on the IPAS scales in men and women to rule out that sex differences on the IPAS scales explain the interaction. The data show that this is not a concern as men and women had comparable IPAS scores (mean, SD): RA = 35.3, 6.0 (men) and 36.2, 6.2 (women); PA = 24.2, 5.3 (men) and 23.4, 5.6 (women).
