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It is as follows:
As can be seen in Table 2, the number of perceived stress scores in the experimental group in the pre-test stage was 35.93 and 22.6 in the post-test stage. In the control group, the scores in the pre-test and post-test stages were 29 and 26.27, respectively. In general, the descriptive findings show how much the scores in all several studies in the post-test stage in the group decreased compared to the control group.
The use of policy tests requires several initial assumptions that in the case of inequality and less than 40 people, the size of the groups can be used according to the assumptions and they can be used from these tests (27). Accordingly, and considering that the test of the hypotheses of this study required univariate and multivariate analysis of covariance and analysis of variance with repeated measures, of course, they must be assumptions. The results of examining these assumptions are presented below. The results obtained from the Kolmogorov-Smirnov test for the different samples of this study showed that the null hypothesis of normality of scores in all selected tests except for night shift systolic pressure in the experimental group remained, meaning that the samples used were normal and matched to the population, and the skewness and extraction of results were random. This assumption is in the same program as the one used in the study. In order to examine the equality of the assumption of equality of covariances or the relationships between research variables, the Box test was used. The results of the Box test were for systolic blood pressure (p=0.037, f=1.929, M=857.22) and diastolic blood pressure (p=0.032, f=1.975, M=402.23). This means that there is a significant difference between the subjects in the experimental and control groups. The results of Levine's test for perceived stress (p=0.063, F=743.3), morning systolic blood pressure (p=0.583, F=0.308), night systolic blood pressure (p=0.583, F=0.308), morning diastolic blood pressure (p=0.743, F=0.06, F=117.07) seem to indicate that Levine's assumption of equality of variances in groups at the pre-test stage has not been accepted in society and remains, but this assumption is possible.
The results of the analysis of covariance of the effect of hypnosis on stress reduction in patients with primary hypertension are presented in Table 3.
As can be seen in Table 3, the pre-test and post-test of perceived stress are significantly related. By controlling for this relationship, the difference between the adjusted means in the post-test phase (after controlling for pre-test scores) in the experimental and control groups is significant (p=0.001), the first hypothesis of the study is tested. In other words, hypnosis is the primary stressor in patients with hypertension in the post-test phase. The effect of hypnosis on stress reduction in the post-test phase was 0.625. This means that about 5.5% of the variance in perceived stress is related to group membership or the effect of hypnosis. The statistical power of 100% shows that the statistical accuracy of this test is excellent. In addition, the sample size was sufficient to test this hypothesis.
Research findings in Table 4, the difference between the mean systolic blood pressure scores in the morning and evening in the pre-test and post-test phases is significant (p=0.001).The results show that nearly 14.1% of the individual differences are related to the difference between the two groups. In addition, the steps between blood pressure measurement and group membership are also significant (p=0.001). In other words, the difference between the diastolic blood pressure scores in the morning and evening in the two experimental and control groups is significant. The magnitude of these differences is about 0.537. That is, 53.7% of the variance or individual differences are related to the differences between the four steps of blood pressure measurement and group membership. In other words, hypnosis reduces the diastolic blood pressure of patients to the initial blood pressure. According to the results obtained in the table above, the difference between the four steps of diastolic blood pressure measurement is significant. The results of pairwise comparisons using these four stages with the LSD test in the four stages of blood pressure measurement showed that the difference between the two systolic pressures in the morning and evening in the pre-test (p=0.001), the morning pre-test and the morning post-test (p=0.001), and the morning pre-test and the evening post-test are significant (p=0.001). Also, the difference between the two systolic pressures in the evening pre-test and the morning post-test (p=0.001) and the evening post-test (p=0.001) is significant. However, the difference in systolic pressure in the two stages of the morning post-test and the evening post-test is not significant. In general, the difference in systolic pressure in the pre-test and post-test stages is different in both morning and night, and according to the table, the blood pressure in the post-test stage is higher than in the pre-test stage. Also, the results of pairwise comparisons of differences in the four stages of blood pressure measurement in the table above show that only the difference in diastolic pressure between the morning pre-test and the evening post-test (p=0.036) and the evening pre-test and the evening post-test (p=0.04) are significant. While the difference in diastolic blood pressure scores in other measurements throughout the study is not significant.
