Marga Hoogendoorn

95 Table 1. Baseline characteristics Patient factors: Included ICUs, nurses, and patients ICU admission type: Unplanned patients – n (%) Planned patients – n (%) 245 (68) 117 (32) Comorbidities: Diabetes Mellitus – n (%) Renal insufficiency – n (%) Cardiovascular insufficiency – n (%) Respiratory insufficiency – n (%) 68 (17.8) 24 (6.3) 16 (4.2) 7 (2.4) APACHE IV Acute Physiology Score – Median (IQR) 68 [47.25 – 96.5] Age – Median (IQR) 66 [56 – 76] BMI – Median (IQR) 25.95 [23.6 – 28.7] In hospital mortality – n (%) 85 (22.3) Length of ICU stay in days– Median (IQR) 3.2 [0.9 – 14.8] Nursing Activities Score per patient (IQR) 31 [25.5 – 38.9] Numbers of patients per nurse 1 patient per nurse – n (%) 95 (41.4) >1 patients per nurse – n (%) 134 (58.5) Education level and level of experience nurses Student nurse – n (%) 20 (8.7) Certified ICU nurse – n (%) 209 (91.3) Type of hospital Academic or teaching hospital – n (%) 6 (75.0) Non-teaching hospital– n (%) 2 (25.0) Type of shift Day – n (%) 84 (37.2) Evening – n (%) 77 (34.0) Night – n (%) 65 (28.8) Table 3 shows the Odds Ratios of the objective nursing workload (Nursing Activities Score) and the perceived nursing workload (NASA-TLX). Only the fourth quintile of the Nursing Activities Score (73.9 - < 83.7) showed a significant higher workload satisfaction compared to the reference category (OR = 2.92 (1.01 – 8.45)). The two highest quintiles of the overall NASA-TLX score ( ≥ 27) were both significantly associated with a higher workload satisfaction (NASA-TLX 27 - <32: OR = 3.26 (1.23 – 8.64); NASA-TLX ≥ 32: OR = 3.04 (1.11-7.98)).