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Table 4 Weekly estimated KPI geometric means and 95 % confidence interval (95 % CI) for Positive unstable and Positive stable

From: Effect of PRRSV stability on productive parameters in breeding herds of a swine large integrated group in Spain

KPI

Positive unstable

(Mean (95 % CI))

Positive stable

(Mean (95 % CI))

Mean Difference

(PS-PU)

p-value

ABTHS

0.78 (0.59–1.02) (n = 741)

0.84 (0.65–1.09) (n = 1256)

+ 0.07

0.297

BAR (%)

90.53 (89.00–92.06) (n = 738)

91.61 (90.10–93.12) (n = 1253)

+ 1.08

< 0.0001

PWMR (%)

12.15(11.05–13.36) (n = 609)

11.20 (10.22–12.28) (n = 1039)

-0.95

0.002

WPTHS

507.74 (465.43–550.04) (n = 732)

532.95 (491.03–574,88) (n = 1253)

+ 25.22

< 0.0001

  1. According to the model used, the genetic was studied as a fix effect and we estimated that genetic D had a significant increase on WPTHS (+ 84.24 weaned piglets/1,000 sows/week, p < 0.001) and genetic B significant reduction on WPTHS (-92.05 weaned piglets/1,000 sows/week, p < 0.03)