Background Intensive care nurses may have an important role in empowering families by providing psychological support and fulfilling the family's pivotal need for information. Aim To determine whether ‘education of families by tab’ about the patient’s condition was more associated with improved anxiety, stress, and depression levels than the ‘education of families by routine’. Research design A randomized control trial of 74 main family caregivers (intervention: 39; control: 35). Setting An adult intensive care unit. Main outcome measures Depression Anxiety Stress Scale, and Communication and Physical Comfort Scale. Results Although information need satisfaction was not significantly different between intervention and control groups, the former reported significantly better depression score on Depression Anxiety Stress Scale comparing to the control group (p<0.01;η2=0.09) with a medium effect size. Reduction of anxiety in the intervention group were clinically significant. Conclusion The results suggest that use of ‘education of family by tab’ is promising for intensive care nurses to provide psychological support for family members. More studies are needed to investigate this aspect of family care for better psychological support and information need satisfaction that contributes to the evidence-based practice of intensive care nursing.