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. 2020 Oct 10;98(10):skaa329. doi: 10.1093/jas/skaa329

Table 8.

Effects of cumulative birth interval category on umbilical cord blood criteria at birth1,2

Cumulative birth interval, min
<44 44 to –95 95 to –164 >164 SEM P-value
n 167 161 165 163
pH 7.52a 7.46b 7.41b 7.32c 0.02 <0.001
pCO2, mmHg 35.5 37.7 38.5 38.9 — 3 0.061
pO2, mmHg 42.5 41.3 41.3 44.7 — 4 0.473
HCO3, mmol/L 28.8a 26.9b 25.3c 22.7d 0.56 <0.001
BE, mmol/L 5.7a 3.0b 0.6c –2.9d 0.75 <0.001
sO2, mmol/L 74.5 71.3 70.1 69.9 1.90 0.199
TCO2, mmol/L 29.8a 28.1b 26.5c 24.1d 0.56 <0.001
Na, mmol/L 126.1a 125.4ab 123.6bc 122.6c 0.80 0.001
K, mmol/L 6.5b 6.9ab 7.0ab 7.4a 0.19 <0.001
iCa, mmol/L 1.47b 1.52b 1.62a 1.68a 0.04 <0.001
Glucose, mg/dL 34.9c 39.9bc 48.1b 51.5a — 5 <0.001
Hematocrit, %PCV 22.4 21.9 22.3 22.7 0.51 0.547
Hemoglobin, g/dL 7.6 7.5 7.6 7.7 0.16 0.624
Birth weight, g 1,215b 1,252ab 1,319a 1,329a 39.3 0.007

1Umbilical cord blood was collected from a total of 656 piglets (623 live-born and 33 stillborn pigs) from 43 sows (Fast Large White × PIC Landrace) immediately after birth and analyzed in a handheld iStat portable clinical analyzer (iStat Alinity, Abbott Point of Care Inc., Princeton, NJ).

2Cumulative 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.

3Log transformation used for analysis. Log transformed means were 3.57, 3.63, 3.65, and 3.66 for the cumulative birth interval categories <44, 44 to 95, 95 to 164 and > 164, respectively. SEM was 0.03.

4Log transformation used for analysis. Log transformed means were 3.75, 3.72, 3.72, and 3.80 for the cumulative birth interval categories <44, 44 to 95, 95 to 164 and >164, respectively. SEM was 0.05.

5Log transformation used for analysis. Log transformed means were 3.52, 3.60, 3.69, and 3.81 for the cumulative birth interval categories <44, 44 to 95, 95 to 164 and >164, respectively. SEM was 0.04.