The impact of nurse staffing levels and nurse’s education on patient mortality in medical and surgical wards: an observational multicentre study

Table 2 Comparison of study measures between hospitals

Hospital	1	2	3	4	5	6	7	total	p-value
Age	59.95 (4.06)	63.04 (5.64)	57.80 (4.67)	62.50 (4.02)	57.15 (5.55)	53.22 (5.34)	62.05 (3.80)	59.07 (5.89)	0.002
CCI	2.37 (0.68)	1.27 (0.79)	0.95 (0.47)	1.78 (1.06)	0.68 (0.52)	2.01 (1.27)	1.34 (0.86)	1.51 (1.00)	0.006
NHPPD	3.65 (0.57)	2.02 (0.29)	2.75 (0.58)	2.56 (0.14)	2.23 (0.35)	2.33 (0.27)	2.40 (0.22)	2.48 (0.59)	< 0.001
Prop. bachelor nurse hours	0.65 (0.05)	0.58 (0.12)	0.52 (0.15)	0.59 (0.10)	0.48 (0.16)	0.72 (0.12)	0.56 (0.09)	0.59 (0.14)	0.001
Nurse assistant HPPD	0.15 (0.16)	0.58 (0.17)	0.10 (0.14)	0.22 (0.19)	0.38 (0.11)	0.34 (0.16)	0.22 (0.09)	0.31 (0.21)	< 0.001
Logistic support staff HPPD	0.45 (0.11)	0.10 (0.15)	0.22 (0.17)	0.13 (0.14)	0.28 (0.13)	0.49 (0.17)	0.13 (0.05)	0.26 (0.20	< 0.001
Hospital LOS	9.80 (1.89)	7.03 (2.55)	5.97 (1.94)	6.44 (1.79)	7.74 (3.24)	7.68 (2.45)	5.45 (1.55)	7.24 (2.62)	0.030
Bed occupancy	27.88 (2.51)	23.27 (2.74)	25.73 (3.22)	25.17 (2.17)	23.53 (5.81)	25.31 (2.11)	27.37 (2.54)	25.21 (3.74)	0.100

This table compares the means including standard deviations from study measures between hospitals
P-values are calculated using a Kruskal Wallis test
CCI Charlson Comorbidity Index, NHPPD Nursing Hours Per Patient Day, Prop. Proportion, HPPD Hours Per Patient Day, LOS Length of Stay

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