Table 3.

The estimated coefficients (β) and 95% CI for associations between content of fat, protein, lactose, and total bacterial count (TBC, ln-transformed) with lnSCC, lactation stage, and season, based on 5,180 bulk milk samples from 88 Norwegian dairy goat herds; herd was included as random effect

Predictor	Fat % β (CI)	Protein % β (CI)	Lactose % β (CI)	lnTBC β (CI)
(Intercept)	4.78 (4.55 to 5.00)***	3.20 (3.09 to 3.31)***	5.43 (5.38 to 5.48)***	1.99 (1.66 to 2.33)***
lnSCC	0.01 (−0.02 to 0.05)NS	0.04 (0.02 to 0.05)***	−0.11 (−0.12 to −0.11)***	0.26 (0.20 to 0.31)***
Lactation stage
Early (<100 DIM)	Referent	Referent	Referent	Referent
Mid (100–180 DIM)	−0.30 (−0.34 to −0.26)***	−0.04 (−0.06 to −0.02)**	−0.17 (−0.18 to −0.16)***	−0.14 (−0.20 to −0.08)***
Late (>180 DIM)	−0.13 (−0.18 to −0.08)***	0.17 (0.14 to 0.19)***	−0.27 (−0.28 to −0.26)***	0.08 (0.00 to 0.15)*
Season
Indoor (spring)	Referent	Referent	Referent	Referent
Pasture (summer)	−0.24 (−0.29 to −0.20)***	−0.13 (−0.15 to −0.11)***	−0.05 (−0.06 to −0.04)***	−0.17 (−0.24 to −0.10)***
Mating period	−0.28 (−0.34 to −0.22)***	−0.09 (−0.12 to −0.06)***	−0.06 (−0.08 to −0.05)***	−0.15 (−0.24 to −0.06)**
Indoor (fall)	−0.23 (−0.29 to −0.17)***	0.09 (0.05 to 0.12)***	−0.10 (−0.12 to −0.09)***	−0.14 (−0.23 to −0.05)**

^*P < 0.05

^**P < 0.01

^***P < 0.001; NS = not significant, P > 0.05.