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Background: Diffusion-weighted magnetic resonance imaging (DW-MRI) permits non-invasive assessment of tumor characteristics., Purpose: To assess the value of DW-MRI as a potential non-invasive marker of tumor aggressiveness in rectal cancer by analyzing the relationship between tumoral apparent diffusion coefficient (ADC) values of MRI and histopathologic prognostic parameters that are not affected by preoperative chemoradiation therapy., Material and Methods: Forty patients with rectal cancer were assessed with primary staging 3-T MRI, including DWI, before undergoing surgical therapy. In all patients, surgery was performed without neoadjuvant therapy. Mean tumor ADC was measured and compared between subgroups based on pretreatment carcinoembryonic antigen (CEA) levels, MRI parameters (e.g. postoperative local recurrence), and histopathologic parameters, including A (invasive distance: A1, T-stage; A2, mesorectal fascia [MRF] status), B (differentiation grade: B1, poorly differentiated; B2, moderately differentiated; B3, well differentiated), C (others: C1, N-stage; C2, lymphangiovascular invasion)., Results: Mean tumor ADCs were different when comparing groups stratified by histologic differentiation grades (P=0.0192). There was no significant difference in mean ADCs when stratifying patients according to CEA levels, T-stage, N-stage, MRF status, presence of lymphangiovascular invasion, or the presence of local recurrence., Conclusion: Significant correlations were found between mean ADC values and differentiation grade. ADC may be useful as an imaging biomarker of tumor aggressiveness, but it cannot serve as an independent biomarker of advanced rectal cancer., (© The Foundation Acta Radiologica 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.)

The present study of a Japanese sample used a prospective approach to examine the relationship between self-rated social problem-solving ability and quality of interpersonal relationships. The Japanese versions of the Problem-Solving self-efficacy scale, problem-solving skills scale, and the interpersonal relationship inventory short form were administered to 139 female and 148 male Japanese college students, who participated in two sessions separated by 6 wk. (time 1 and time 2). Partial correlations controlling for scores on the interpersonal relationship scales at Time 1 indicated that self-ratings of social problem-solving ability were correlated with aspects of interpersonal relationships assessed at time 2, and this relationship was stronger for men (five of six correlations were significant) than for women (two of six correlations were significant).

To clarify the relations of the dimensions of social problem solving with those of interpersonal competence in a sample of 234 Japanese college students, Japanese versions of the Social Problem-solving Inventory-Revised and the Social Skill Scale were administered. Pearson correlations between the two sets of variables were low, but higher within each set of subscales. Cronbach's alpha was low for four subscales assessing interpersonal competence.

The Interpersonal Relationship Inventory (Tilden, Nelson, & May, 1990a) is a 39-item self-report measure to assess three aspects (support, reciprocity, and conflict) of perceived social relationships. In this research, short forms of the Japanese version (Sumi, 2003) of the inventory were developed on the basis of data from two sources. For the item selection, data from 340 Japanese college students (148 women, 192 men; M age = 21.6 yr., SD = 1.6) who completed the original full form of the inventory were used to create three internally consistent short forms. The reliability and construct validity of the short forms were examined upon administering them to among 513 college students (226 women, 287 men; M age =19.9 yr., SD = 1.4). All the subscales of the short forms had acceptable internal consistency (alphas = .70-.90) and test-retest reliability (rs = .72-.81). Confirmatory factor analysis of each short form supported the fact that each form had a three-factor structure. Scores on the subscales shared acceptable overlapping variance with the corresponding subscale scores of the original full form, and these scores were weakly but significantly correlated with the scores for satisfaction with social support, loneliness, and perceived stress. All the short forms had acceptable reliability and construct validity.

The Japanese versions of the Interpersonal Relationship Inventory, the Satisfaction with Life Scale, and the Self-esteem Scale were administered to 153 Japanese college students. Weak to modest significant correlations between scores on the inventory and measure of life satisfaction and self-esteem provided further incremental support for construct validity of the inventory.

The factor structure of the Japanese translation of five work commitment measures, i.e., the Work Involvement Questionnaire, the Career Commitment Scale, the Job Involvement Questionnaire, the Organizational Commitment Questionnaire, and the Work Group Attachment Scale, was examined in 496 Japanese employees. Exploratory factor analysis clearly identified five factors which reflected commitment toward the job, organization, work group, career, and work itself. The items composing each factor were consistent with the items included in each of the five measures used.

This study examined the relationships between self-report scores of 275 Japanese college students on the Japanese version of the revised Life Orientation Test and the Interpersonal Relationship Inventory. Ratings for optimism were positively correlated with those for social support and reciprocity (rs= .39 and .29, respectively) and negatively correlated with those for interpersonal conflict (r = -.26).

The Japanese translation of the revised Life Orientation Test was completed by 223 Japanese college students. Factor analysis yielded two factors, namely, Optimism and Pessimism. These factor scales showed adequate reliability and construct validity.

The present study examined the psychometric characteristics of the three network function subscales (Social Support, Conflict, and Reciprocity) in the Japanese version of the Interpersonal Relationship Inventory. Data from Japanese college students (250 women and 218 men) were analyzed to estimate internal consistency (alphas = .93-.96) and test-retest reliability (rs = .69-.74). To assess construct validity, correlations between scores on the inventory and measures of social support, loneliness, and stress were performed. Results indicated that the Japanese version of the inventory was valid and reliable.

The relations among self-report scores for Type A behavior with social support and sex were examined in 239 female and 213 male Japanese college students. Scores on Type A behavior were inversely correlated with those for social support for both women and men separately. There were no significant differences in the magnitudes of these coefficients for women and men.

The present study examined the relationship between self-report scores of neurotic perfectionism and of perceived stress and self-esteem 6 wk. later among 146 Japanese male college students. Hierarchical regression analysis indicated that scores for neurotic perfectionism accounted for statistically significant but functionally small variance (4% and 3%) in scores for perceived stress and self-esteem obtained at Time 2 (6 wk. later), after controlling for the scores for perceived stress and self-esteem at Time 1, respectively.

The present study examined the relationships among self-report scores for Type A behavior, social support, and stress, and those for physical and psychological well-being among 152 Japanese female college students. Significant interactions were found between scores for Type A behavior and social support, indicating that individuals who report higher Type A behavior as well as higher social support tended to rate their physical and psychological well-being higher than those who reported higher Type A behavior but lower social support.

The present study examined the relationship between self-reported scores on optimism, social support, and stress and on physical and psychological well-being in 176 Japanese female college students. The significant interactions found among scores on optimism, social support, and stress suggest that individuals who reported higher optimism and social support also rated themselves higher with respect to physical and psychological well-being, regardless of their reported stress.

The relations of self-report scores for optimism, Type A behavior, and stress with those for depression and anxiety were examined in 144 Japanese female college students. A significant interaction of scores on optimism and Type A behavior indicated that subjects who reported higher optimism and higher Type A behavior had a lower mean for anxiety than those who reported lower optimism and higher Type A behavior.