We analyze monomorphic equilibria of long-term evolution for one or two continuous traits, controlled by an arbitrary number of autosomal loci and subject to constant viability selection. It turns out that fitness maximization always obtains at long term equilibria, but in the case of two traits, linkage determines the precise nature of the fitness measure that is maximized. We then consider local convergence to long term equilibria, for two multilocus traits subject to either constant or frequency dependent selection. From a model of long-term dynamics near an equilibrium we derive a criterion of local long-term stability for 2-dimensional equilibria. It turns out that mutation can be a decisive factor for stability.

We analyze monomorphic equilibria of long-term evolution for one or two continuous traits, controlled by an arbitrary number of autosomal loci and subject to constant viability selection. It turns out that fitness maximization always obtains at long term equilibria, but in the case of two traits, linkage determines the precise nature of the fitness measure that is maximized. We then consider local convergence to long term equilibria, for two multilocus traits subject to either constant or frequency dependent selection. From a model of long-term dynamics near an equilibrium we derive a criterion of local long-term stability for 2-dimensional equilibria. It turns out that mutation can be a decisive factor for stability.

Education 1 | Cristina Arrigoni RN, MSN, Researcher 2 | Irene Baroni RN, MSN, Clinical Research Nurse 1 | Gianluca Conte RN, Clinical Research Nurse 3 | Cristina Di Pasquale RN, Stoma-therapist Nurse Specialist 4 | Lorenzo Casole RN, Clinical Nurse 1 | Giulia Villa PhD, RN, Head Nurse 5 | Abstract Aim: To develop and psychometrically test a self-efficacy scale for ostomy care nursing management.Design: This study adopted a multi-method and multi-phase design. Method: Phase 1 of the study was comprised of the developmental tasks, where items were generated based on the emergent themes from literature. The items were then discussed with a panel of experts. Phase 2 focused on the validation process of the scale, where its content validity, construct and concurrent validity, and its internal consistency were assessed. The validation process was conducted Results: The final version of the self-efficacy scale in ostomy care nursing management encompasses 24 items in three domains, namely the clinical assessment domain, the education and relationship domain, and the teamwork domain. The scale showed the evidence of face and content validity, adequate construct and concurrent validity, and adequate internal consistency. Conclusion: The developed scale can be used in clinical and educational research.Impact: This study presents the development and validation of the first valid and reliable self-reporting measurement for nurses' self-efficacy in ostomy care nursing management. Self-efficacy ostomy care nursing management encompasses 24 items and three domains, which are clinical assessment, education and relationship, and teamwork. This research will have an impact on nursing education, as it addresses the need for a specific self-efficacy assessment of ostomy care nursing management. Self-efficacy ostomy care nursing management will have an impact on nurses and patients, as it can be used to improve nurses' self-efficacy and clinical outcomes for patients in ostomy care.

PURPOSE: The purpose of this study was to evaluate the validity and reliability of the Italian version of the Ostomy Adjustment Inventory-23 (OAI-23). DESIGN: This is a methodological study evaluated psychometric properties of the OAI-23. SUBJECTS AND SETTING: A sample of 230 patients with an ostomy was enrolled in an Italian university hospital from May to September 2017. METHODS: This study comprised two phases; during phase 1, the cultural-linguistic translation of the OAI-23 into Italian was completed. In addition, content and face validity were tested. In phase 2, psychometric testing of the OAI-23 was conducted in a cross-section sample of 258 Italian patients with a fecal ostomy. RESULTS: The Italian version of the OAI-23 presents 23 items giving a 3-dimensional structure: acceptance, negative feelings, and social engagement. Accordingly, this 3-dimensional structure arise from an exploratory factorial analysis with the maximum likelihood robust estimator (RMSEA = 0.089 [95% CI = 0.063-0.113; P = .05], and CFI = 0.901, explaining 44% of the total variance). The internal consistency of the OAI-23 was good (Cronbach α for acceptance = 0.91; for negative feelings = 0.87; for social engagement = 0.93; for overall scale = 0.91). CONCLUSIONS: The OAI-23 provides a valid and reliable assessment of patients' psychosocial adjustment to an ostomy. It provides important resource for clinical decision-making; for example, it may be used to design or tailor educational strategies to enhance psychosocial adjustment following creation of an ostomy.