Nursing Workload Prediction for Upcoming Shifts: A Retrospective Observational Exploratory Study in the Postoperative and Intensive Care Unit

Table 4

Linear regression on aggregated data with NAS-day shift and NAS-evening shift as dependent variables and NAS-night shift, NAS-day shift, and demographic characteristics as independent variables.

NAS-day shift as dependent variable	Univariable linear regression				Multivariable linear regression
	B (95% CI)	β			B (95% CI)	β		Adjusted  = 0.731
NAS-night shift	0.94 (0.82, 1.07)	0.74	<0.001	0.551	0.97 (0.87, 1.06)	0.76	<0.001
Age mean, day	−1.11 (−5.59, 3.37)	−0.04	0.625	0.001	1.11 (−1.26, 3.48)	0.04	0.357
Proportion of women, day	−0.60 (−2.24, 1.04)	−0.05	0.471	0.003	−0.28 (−1.18, 0.63)	−0.03	0.548
Proportion of surgical patients, day	1.52 (0.14, 2.91)	0.16	0.031	0.026	−0.41 (−1.41, 0.59)	−0.04	0.424
Proportion of emergency patients, day	−2.81 (−3.79, −1.82)	−0.39	<0.001	0.150	−3.40 (−4.15, −2.65)	−0.47	<0.001
NAS-evening shift as dependent variable	Univariable linear regression				Multivariable linear regression
	B (95% CI)	β			B (95% CI)	β		Adjusted  = 0.663
NAS-day shift	0.84 (0.75, 0.92)	0.82	<0.001	0.669	0.84 (0.74, 0.94)	0.82	<0.001
Age mean, evening	0.61 (−3.07, 4.29)	0.02	0.744	0.001	0.88 (−1.32, 3.08)	0.04	0.429
Proportion of women, evening	−1.03 (−2.47, 0.42)	−0.10	0.164	0.011	−0.34 (−1.23, 0.55)	−0.04	0.448
Proportion of surgical patients, evening	0.57 (−0.94, 2.08)	0.06	0.457	0.003	0.04 (−1.05, 1.12)	0.003	0.949
Proportion of emergency patients, evening	−2.97 (−4.26, −1.68)	−0.32	<0.001	0.103	0.10 (−0.94, 1.13)	0.01	0.855

NAS, Nursing Activities Score; B, unstandardized regression coefficient; CI, confidence interval; β, standardized regression coefficient. value <0.05 indicates statistical significance.