Marga Hoogendoorn

79 one patient per nurse was 54.2 points (SD 19.6), the mean score per nurse if taking care for more than one patient was 77.8 points (SD17.2), with a mean score per patient of 38.6 points (SD 9.4). Table 3 gives an overview of both the unadjusted and adjusted beta coefficients and standard errors of the analyzed factors. We adjusted a factor for other factors if these were identified as a confounding factor in the association frameworks (see appendix 5 Figure 1.1 till 1.10). Table 2. Mean NAS and NASA-TLX Mean (SD) NAS Mean (SD) NASA-TLX / nurse All patients Per nurse Per patient 67.8 (21.5) 41.3 (12.9) 24.3 (9.1) - * Patient factors: Mean (SD) NAS / patient Admission type: a. unplanned admissions b. planned admissions 42.9 (13.1) 36.7 (9.7) - * Comorbidities: Patients with 1 comorbidity Patients with >1 comorbidity 39.6 (10.6) 43.1 (15.0) - * Age: a. Young patients (< 45 years) b. Old patients (>80 years) 40.1 (12.6) 44.9 (15.0) - * BMI: ≤ 30 >30 40.9 (12.3) 41.8 (11.0) - * Nursing factors: Mean (SD) NAS / nurse Mean (SD) NASA-TLX / nurse Education level and level of experience nurses: Student nurse Certified ICU nurse 66.2 (21.0) 68.0 (21.7) 27.6 (7.5) 24.0 (9.2) Contextual factors: Mean (SD) NAS / nurse Mean (SD) NASA-TLX / nurse Hospital type: Academic or teaching hospital non-teaching hospital 70.5 (21.1) 58.7 (21.0) 32.1 (9.5) 27.3 (9.5) Numbers of patients per nurse: 1 patient per nurse >1 patient per nurse 54.2 (19.6) 77.8 (17.2) 28.0 (10.5) 32.7 (9.0) Kind of shift: Day Evening Night 69.2 (24.7) 68.6 (20.1) 65.7 (19.4) 25.3 (8.9) 24.2 (9.0) 23.4 (9.4) * No NASA-TLX/Nurse because patient factors can differ per patient in case of more than one patient per nurse