[Psychometric properties of Q-DIO, an instrument to measure the quality of documented nursing diagnoses, interventions and outcomes].

The instrument Q-DIO was developed in the years 2005 till 2006 to measure the quality of documented nursing diagnoses, interventions, and nursing sensitive patient outcomes. Testing psychometric properties of the Q-DIO (Quality of nursing Diagnoses, Interventions and Outcomes.) was the study aim. Instrument testing included internal consistency, test-retest reliability, interrater reliability, item analyses, and an assessment of the objectivity. To render variation in scores, a random strata sample of 60 nursing documentations was drawn. The strata represented 30 nursing documentations with and 30 without application of theory based, standardised nursing language. Internal consistency of the subscale nursing diagnoses as process showed Cronbach's Alpha 0.83 [0.78, 0.88]; nursing diagnoses as product 0.98 [0.94, 0.99]; nursing interventions 0.90 [0.85, 0.94]; and nursing-sensitive patient outcomes 0.99 [0.95, 0.99]. With Cohen's Kappa of 0.95, the intrarater reliability was good. The interrater reliability showed a Kappa of 0.94 [0.90, 0.96]. Item analyses confirmed the fulfilment of criteria for degree of difficulty and discriminative validity of the items. In this study, Q-DIO has shown to be a reliable instrument. It allows measuring the documented quality of nursing diagnoses, interventions and outcomes with and without implementation of theory based, standardised nursing languages. Studies for further testing of Q-DIO in other settings are recommended. The results implicitly support the use of nursing classifications such as NANDA, NIC and NOC.