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The number of incidents of self-mutilating behavior decreased over the course of treatment in the partially hospitalized group but remained constant in the control group (Figure 1). In the partially hospitalized group, the median number of self-mutilations per 6-month period was reduced from 9 to 1, whereas in http://datingranking.net/dog-dating the control group over the same time period, the change was from 8 to 6. The trend test was highly significant for the partially hospitalized group (Kendall’s W=0.21, ? 2 =11.9, df=3, p<0.008) but not significant for the control group (Kendall's W=0.05, ? 2 =2.4, df=3, n.s.). Group differences in the number of attempts at self-mutilation emerged by 12 months, and the number of individuals no longer self-mutilating was significantly greater by 18 months in the partially hospitalized group than in the control group (? 2 =7.0, df=1, p<0.008).
Individuals were interviewed and coded every 6 months for the presence or absence of suicide attempts. Figure 1 shows the proportion of each group with reported suicide attempts in the previous 6 months, on admission, at 6 months, at 12 months, and at 18 months. In the partially hospitalized group, there was a clear reduction from 94.7% on admission (mean=1.68) to 5.3% (mean=0.16) at 18 months. This trend was highly significant (Kendall’s W=0.59, ? 2 =33.5, df=3, p<0.001). The same test revealed no significant trend for the control group (Kendall's W=0.04, ? 2 =2.4, df=3, n.s.). Group differences emerged by 6 months. The number of individuals who were no longer parasuicidal was significantly greater in the partially hospitalized group than in the control group by 12 months (? 2 =4.3, df=1, p<0.05).
Changes in inpatient treatment showed a somewhat more complicated pattern. The average length of hospitalization, adjusted for preadmission values, is displayed in Figure 2. This confirms that the average length of hospitalization in the control group in the last 6 months of the study increased dramatically, whereas in the partially hospitalized group, it remained relatively stable at around 4 days per 6 months. The group-by-time interaction was significant (F=7.7, df=1, 35, p<0.01), with a highly significant quadratic component (F=13.3, df=1, 35, p<0.001). The post hoc tests yielded significant differences at 6 months (t=7.66, df=36, p<0.001) and 18 months (t=, df=36, p<0.001). An identical pattern emerged for the number of inpatient episodes (F=14.1, df=1, 35, p<0.001, and F=19.9, df=1, 35, p<0.001, for the two-way and quadratic components of the interaction, respectively).
The need for medication was reduced in both groups. In the control group, of those who were taking medication at the start of the study, 78% were still taking medication compared to only 38% of those in the partially hospitalized group at the end of the trial (corrected ? 2 =4.8, df=1, p<0.03).
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Two measures of anxiety (state and trait scales from the Spielberger State-Trait Anxiety Inventory) were obtained from participants (Table 2). Both self-reported state and trait anxiety scores decreased substantially in the partially hospitalized group but remained unchanged in the control group. The time-by-group interaction was significant (F=9.2, df=1, 33, p<0.005, and Wilks's lambda=0.62, F=3.6, df=5, 29, p<0.02, for state and trait scores, respectively). The polynomial decomposition of the interactions revealed significant differences in the linear component of both interactions (F=32.9, df=1, 33, p<0.001, and F=15.1, df=1, 33, p<0.001, for state and trait scores, respectively), confirming that the slopes were significantly different for the two groups. Post hoc analysis indicated that the two groups began to report significantly different levels of state and trait anxiety measures from 9 months (t=4.69, df=36, p<0.001, and t=3.64, df=36, p<0.001, respectively).