Tidal volume according to the 4-point sealing forces of a bag-valve-mask: an adult respiratory arrest simulator-based prospective, descriptive study

Uhm, Dongchoon; Kim, Ajung

doi:10.1186/s12873-021-00451-1

Table 3 Moderating effects of C length

From: Tidal volume according to the 4-point sealing forces of a bag-valve-mask: an adult respiratory arrest simulator-based prospective, descriptive study

	MODEL I					MODEL II					MODEL III
	B	S.E.	β	t	p	B	S.E.	β	t	p	B	S.E.	β	t	p
(Constant)	310.872	47.135		6.595^***	< 0.001	307.808	47.382		6.496^***	< 0.001	334.357	47.89		6.982^***	< 0.001
PP	100.495	10.254	0.743	9.800^***	< 0.001	99.688	10.324	0.737	9.656^***	< 0.001	94.404	10.149	0.698	9.302^***	< 0.001
ln (ASF)	17.521	8.789	0.13	1.993^*	0.049	18.055	8.832	0.134	2.044^*	0.043	14.649	8.554	0.108	1.712	0.09
BSF	6.5	10.192	0.048	0.638	0.525	6.342	10.212	0.047	0.621	0.536	4.327	9.856	0.032	0.439	0.662
LSF	4.409	9.854	0.033	0.447	0.655	3.907	9.892	0.029	0.395	0.694	2.139	9.583	0.016	0.223	0.824
RSF	−3.477	10.918	−0.026	−0.318	0.751	−4.074	10.965	−0.03	−0.372	0.711	−3.596	11.616	−0.027	− 0.31	0.758
Gender
male	11.739	18.759	−0.043	− 0.626	0.533	13.801	18.976	0.051	−0.727	0.469	2 < .001	18.86	0.007	−0.106	0.916
School year
first	2.92	58.543	0.106	−0.562	0.575	27.907	58.996	−0.09	−0.473	0.637	73.986	59.456	0.237	−1.244	0.216
second	18.859	41.901	0.06	0.45	0.654	23.252	42.348	0.074	0.549	0.584	−4.849	43.107	−0.015	−0.112	0.911
third	57.199	45.923	0.21	1.246	0.216	61.172	46.284	0.225	1.322	0.189	22.461	46.958	0.083	0.478	0.633
Academic grades
4.0≤	−28.406	32.624	−0.077	−0.871	0.386	−28.663	32.685	−0.078	− 0.877	0.383	− 23.244	31.585	− 0.063	− 0.736	0.463
3.0–3.99	−12.027	23.923	−0.042	− 0.503	0.616	− 11.718	23.969	− 0.041	− 0.489	0.626	−6.857	23.571	− 0.024	− 0.291	0.772
CPS	3.311	9.89	0.024	0.335	0.738	2.246	10 < .001	0.016	0.225	0.823	7.509	9.872	0.055	0.761	0.449
MS	1.898	10.639	0.014	0.178	0.859	3.284	10.804	0.024	0.304	0.762	−3.038	10.528	−0.022	− 0.289	0.774
EBVNV
yes	17.288	19.721	0.064	0.877	0.383	17.003	19.76	0.063	0.86	0.391	14.758	19.037	0.055	0.775	0.44
AC	−7.255	14.701	−0.054	−0.494	0.623	−6.416	14.766	−0.047	− 0.435	0.665	−15.33	14.527	−0.113	−1.055	0.294
BMI (kg/m²)	−1.77	9.278	−0.013	−0.191	0.849	−1.77	9.295	−0.013	−0.19	0.849	1.725	9.388	0.012	0.184	0.855
Knowledge	12.99	9.535	0.096	1.362	0.176	12.142	9.613	0.089	1.263	0.209	11.123	9.273	0.082	1.2	0.233
Performance confidence	−4.618	9.465	−0.035	−0.488	0.627	−5.982	9.64	−0.045	−0.621	0.536	−2.116	9.422	−0.016	−0.225	0.823
C.						−6.774	8.63	−0.05	−0.785	0.434	−0.135	9.095	−0.001	−0.015	0.988
PP × C.											25.179	10.33	0.195	2.437^*	0.017
ln (ASF) × C.											20.637	8.287	0.154	2.490^*	0.014
BSF × C.											5.286	9.198	0.035	0.575	0.567
LSF × C.											−9.387	7.948	−0.071	−1.181	0.24
RSF × C.											−20.306	13.815	−0.129	−1.47	0.145
	F = 11.210^***, R²(_adj R²) = .656(.597)					F = 10.614^***, R²(_adj R²) = .658(.596)					F = 9.676^***, R²(_adj R²) = .699(.627)

PP Peak pressure, ASF Apex sealing force, BSF Bottom sealing force, LSF Left sealing force, RSF Right sealing force, CPS Clinical practice satisfaction, MS Major satisfaction, EBVNV Experience of BVM ventilation, AC Acquired certificate, C. C length
ln (ASP) = ln (ASP+ 1)^{8;, *}p < 0.05, ^**p < 0.01, ^***p < 0.001;Durbin-Watson = 1.928

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