Table 5.

Effects of umbilical cord blood measurements at birth and piglet characteristics on piglet survival to 24 h¹

	Mortality	Alive at 24 hr	SEM	P-value
N	38	585	—	—
pH	7.35	7.46	0.03	<<0.001
pCO2	42.5	37.3	— 2	0.002
pO2	36.6	42.5	— 3	0.099
HCO3, mmol/L	24.2	26.6	0.96	0.011
BE, mmol/L	–1.5	2.7	1.26	0.001
sO2, mmol/L	63.3	72.9	3.48	0.005
TCO2, mmol/L	25.4	27.7	0.97	0.014
Na, mmol/L	122.3	124.8	1.41	0.068
K, mmol/L	6.8	6.9	0.32	0.770
iCa, mmol/L	1.7	1.6	0.06	0.018
Glucose, mg/dL	34.9	39.9	— 4	0.008
Hematocrit, %PCV	22.5	22.3	0.81	0.736
Hemoglobin, g/dL	7.7	7.6	0.26	0.684
Birth weight, g	1,023	1,299	56.9	<<0.001
Birth-order ranking5	0.55	0.47	0.05	0.133
CumBI6	117	100	13.0	0.134

¹A total of 623 live-born pigs were used in analysis for survival to 24 h of life. Umbilical cord blood was collected from a total of immediately after birth and analyzed in a handheld iStat portable clinical analyzer (iStat Alinity, Abbott Point of Care Inc., Princeton, NJ).

²Log transformation used for analysis. Log transformed means were 3.80 and 3.59 for mortality and alive at 24 hr, respectively. SEM was 0.05.

³Log transformation used for analysis. Log transformed means were 3.60 and 3.79 for mortality and alive at 24 hr, respectively. SEM was 0.09.

⁴Log transformation used for analysis. Log transformed means were 3.50 and 3.61 for mortality and alive at 24 hr, respectively. SEM was 0.06.

⁵Birth--order ranking was calculated for each pig as: [(pig birth order – 1)/(total born – 1)].

⁶Cumulative birth interval for each pig born was calculated as the time (min) elapsed from the birth of first pig until birth time of the current pig.