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The average declines of the anti‐parvovirus IgG titre at 10 day intervals compared to the titre at day 10 as the reference titre which were both significant (p < 0.001). The average reduction of the titre from day 10 to 20 and day 20 to 30 was estimated at 1812.7 and 2833.2, respectively.
| Age (day) | Mean (SD) | 95 % CI | P value |
|---|---|---|---|
| 10 day | Re 5675.5 | — | — |
| 20 day | −1812.7 (1549.2) | −2733 to ‐ 892.2 | < 0.001 |
| 30 day | −2833.2 (2299.2) | −3800.5 to ‐1866.0 | < 0.001 |
