Table 4 Generalized estimating equation analysis of bulk tank milk continuous ELISA results
Independent variable | Coefficient (n = 31) | Confidence interval (95%) | P value | Model P value |
|---|---|---|---|---|
ILDANA | ||||
 April vs. December | −24.21 | −34.09, −14.32 | < 0.001 | Time Herd size Treatment (< 0.001) |
 July vs. December | −36.46 | −46.37, −26.55 | < 0.001 | |
 October vs. December | −21.97 | −32.30, − 11.65 | < 0.001 | |
 July vs. April | −12.25 | −20.91, −3.59 | 0.006 | |
 October vs. April | 2.23 | −6.79, 11.25 | 0.628 | |
 October vs. July | 14.48 | 5.42, 23.54 | 0.002 | |
 Treated vs. not treated | 24.17 | 6.62, 41.72 | 0.007 | |
IDEXX | ||||
 April vs. December | −36.22 | −55.98, −16.47 | < 0.001 | Time Herd size Treatment (< 0.001) |
 July vs. December | −70.78 | −90.57, − 50.98 | < 0.001 | |
 October vs. December | −63.27 | −83.91, −42.63 | < 0.001 | |
 July vs. April | −34.55 | −51.82, −17.27 | < 0.001 | |
 October vs. April | −27.04 | −45.07, −9.02 | 0.003 | |
 October vs. July | 7.50 | −10.57, 25.58 | 0.416 | |
 Treated vs. not treated | 29.69 | −10.30, 69.69 | 0.146 | |
SVANOVIR | ||||
 April vs. December | −0.19 | −0.28, −0.10 | < 0.001 | Time Herd size Treatment (< 0.001) |
 July vs. December | −0.29 | − 0.38, − 0.19 | < 0.001 | |
 October vs. December | − 0.10 | − 0.20, − 0.01 | 0.036 | |
 July vs. April | − 0.09 | − 0.17, − 0.01 | 0.021 | |
 October vs. April | 0.09 | 0.01, 0.17 | 0.044 | |
 October vs. July | 0.18 | 0.09, 0.26 | < 0.001 | |
 Treated vs. not treated | 0.11 | −0.04, 0.26 | 0.162 | |
BIO-X | ||||
 April vs. December | −22.00 | −31.54, −12.47 | < 0.001 | Time Herd size Treatment (< 0.001) |
 July vs. December | −18.75 | −28.30, −9.20 | < 0.001 | |
 October vs. December | −16.41 | −26.37, −6.45 | 0.001 | |
 July vs. April | 3.25 | −5.07, 11.57 | 0.444 | |
 October vs. April | 5.59 | −3.09, 14.28 | 0.207 | |
 October vs. July | 2.34 | −6.36, 11.05 | 0.598 | |
 Treated vs. not treated | 30.07 | 20.29, 91.31 | 0.002 | |