Killing underweighted low viable newborn piglets: Which health parameters are appropriate to make a decision?

Geiping, Lukas; Hartmann, Maria; Kreienbrock, Lothar; grosse Beilage, Elisabeth

doi:10.1186/s40813-022-00265-y

Porcine Health Management

Table 5 Logistic regression model for clinical variables related to killing or spontaneously death of newborn piglets dying until day 5 of age

From: Killing underweighted low viable newborn piglets: Which health parameters are appropriate to make a decision?

Risk categories	Alive		Dead		Univariable model				Multivariable model
	n	%	n	%	OR	95%-CI		p	OR	95%-CI		p^b
	n	%	n	%	OR	Low	Up			Low	Up
Total	372	71.68	147	28.32	x	x	x	x	x	x	x	x
Herd/group (p = 0.0033) ^a
11(ref)	26	56.52	20	43.48	1	x	x	x	1	x	x	x
12	27	65.85	14	34.15	0.674	0.282	1.609	0.3741	0.229	0.053	0.984	0.4722
13	19	51.35	18	48.65	1.232	0.516	2.937	0.6386	0.618	0.145	2.636	0.2897
21	33	73.33	12	26.67	0.473	0.196	1.141	0.0956	0.281	0.074	1.071	0.7145
22	25	60.98	16	39.02	0.832	0.353	1.959	0.6738	0.845	0.239	2.989	0.0373
23	38	74.51	13	25.49	0.445	0.189	1.049	0.0643	0.326	0.086	1.232	0.9287
31	26	83.87	5	16.13	0.250	0.082	0.767	0.0153	0.083	0.014	0.479	0.0451
32	35	87.50	5	12.50	0.186	0.062	0.560	0.0028	0.212	0.048	0.933	0.4034
33	38	95.00	2	5.00	0.068	0.015	0.318	0.0006	0.102	0.017	0.627	0.1074
41	43	82.69	9	17.31	0.272	0.108	0.686	0.0058	0.195	0.055	0.687	0.2282
42	28	66.67	14	33.33	0.650	0.273	1.547	0.3301	1.523	0.430	5.394	0.0005
43	34	64.15	19	35.85	0.726	0.323	1.632	0.4390	0.401	0.117	1.369	0.6833
Body weight (p = 0.0418) ^a
≤ 0.86 kg	69	41.07	99	58.93	23.475	11.870	46.424	< .0001	3.715	1.103	12.507	0.1221
0.86–1 kg	123	76.88	37	23.13	4.922	2.417	10.023	< .0001	2.973	1.238	7.140	0.1885
> 1 kg (ref)	180	94.24	11	5.76	1	x	x	x	1	x	x	x
Vitality score (p ≤ .0001) ^a
0 (ref)	296	90.80	30	9.20	1	x	x	x	1	x	x	x
1	74	54.41	62	45.59	8.265	4.989	13.694	< .0001	3.325	1.589	6.958	0.0710
2	2	3.51	55	96.49	271.333	63.013	1168.351	< .0001	61.358	10.609	354.867	< .0001
Intrauterine growth retardation score (p = 0.1765) ^a
0 (ref)	274	88.10	37	11.90	1	x	x	x	1	x	x	x
1	86	63.24	50	36.76	4.305	2.640	7.022	< .0001	1.582	0.656	3.814	0.6534
2	12	16.67	60	83.33	37.027	18.231	75.201	< .0001	3.412	0.929	12.538	0.0678
Rectal temperature (p = 0.0003) ^a
≤ 37.5 °C	48	32.21	101	67.79	14.818	9.336	23.519	< .0001	3.372	1.745	6.517	0.0003
> 37.5 °C (ref)	324	87.57	46	12.43	1	x	x	x	1	x	x	x
Sex (p = 0.0680)^a
Female (ref)	187	73.91	66	26.09	1	x	x	x	1	x	x
Male	185	69.55	81	30.45	1.241	0.846	1.820	0.2704	1.712	0.961	3.049	0.0680

Due to missing values vitality scores 2 and 3 were aggregated to one category for modelling purposes
ref, reference category; OR, odds ratio estimate; CI, confidence limits; p, level attained for the statistical test associated
^aGeneral p value Wald’s Chi²-test (p < 0.05 are marked in bold)
^bp value Wald’s Chi²-test (p < 0.05 are marked in bold) to the reference category

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