Table 4.

Differences in nursing competence between groups

	Ratio of RNs in staff		Shifts with one RN on duty		Nightshifts with one RN on duty		Dayshifts with one RN on duty
Comparation between groups	r	Adj. p value	r	Adj. p value	r	Adj. p value	r	Adj. p value
Institutional locations
Nursing homes- Others	0.31	< 0.001	0.22	0.028	0.19	0.102		na
Nursing homes- HH/LMCs	0.39	<  0.001	0.37	< 0.001	0.29	0.001		na
Nursing homes- OMS	0.43	<  0.001	0.33	< 0.001	0.31	< 0.001		na
Others- HH/LMCs	0.09	1.0	0.19	1.0	0.13	1.00		na
Others- OMS	0.26	1.0	0.22	1.0	0.24	1.00		na
HH/LMCs- OMS	0.17	1.0	0.03	1.0	0.11	1.00		na
Organisation categories
Short-term care units -Separate MipAC units	0.27	0.017	0.21	0.094	0.14	0.5		na
Long-term care units -Short-term care unites	0.43	<  0.001	0.44	< 0.001	0.31	< 0.001		na
Long-term care units -Separate MipAC units	0.56	<  0.001	0.52	< 0.001	0.37	< 0.001		na
Geographical region
Central Norway-Southern-Eastern Norway	0.26	0.022		na		na		na
Central Norway-Western Norway	0.34	0.020		na		na		na
Northern Norway -Southern-Eastern Norway	0.26	0.017		na		na		na
Northern Norway-Western Norway	0.31	0.019		na		na		na
Central Norway-Northern Norway	0.02	1.000		na		na		na
Southern-Eastern Norway-Western-Norway	0.06	1.000		na		na		na
	r	p-value	r	p-value	r	p-value	r	p-value
Not intermunicipal MipAC- Intermunicipal MipAC	0.45	<  0.001		na	0.32	<  0.001	0.20	0.005
Less than two MipAC beds or more	0.51	<  0.001	0.34	< 0.001		na	0.28	< 0.001

Not applicable = na, due to heterogeneity of variance as described in Field (2009). Comparing evening shifts between the group categories was not applicable. A large effect is proposed to be r ≥ 0.5, a medium effect r = 0.3–0.5, and a small effect r ≥ 0.1 (Fritz et al. 2012)