Descriptive Statistics for Major Study Variables.

BackgroundClinical decision-making by intensive care unit nurses is vital for ensuring patient safety. It is hypothesized that professional autonomy and interprofessional collaboration are determinants that influence the quality of decision-making; however, empirical evidence supporting this hypothesis within Iranian intensive care unit settings remains limited.ObjectiveTo examine the correlations between perceived autonomy, nurse–physician collaboration, and clinical decision-making ability among intensive care unit nurses.MethodsThis study employed a cross-sectional design, with 400 intensive care unit nurses from two university hospitals in Tehran completing validated Persian versions of the P-AITCS-II, the Dempster/DPBS, and the Lauri & Salanterä instruments to measure interprofessional collaboration, professional autonomy, and clinical decision-making, respectively. We followed STROBE reporting recommendations. Descriptive statistics characterized the sample and scale scores. Bivariate associations were assessed using correlation and group-comparison tests, and multiple linear regression was employed to estimate the independent associations of autonomy and collaboration with decision-making after adjusting for relevant covariates. Ethical approval and informed consent were obtained.ResultsThe study sample comprised 400 participants, with a mean age of 33.19 years (SD = 5.67). In bivariate analyses, higher perceived autonomy and greater interprofessional collaboration were positively associated with better clinical decision-making (p ConclusionsAmong the intensive care unit nurses within this sample, higher perceived professional autonomy and enhanced interprofessional collaboration were independently correlated with improved self-reported clinical decision-making capabilities. Given the cross-sectional nature of the study, causality cannot be established. Longitudinal research employing objective performance metrics is necessary to examine causal relationships and to guide organizational strategies that foster both autonomy and collaborative practice.