Table 6.

Results from three multivariable linear regression models for the association between the log10-transformed bulk milk somatic cell count (BMSCC), total bacterial count (TBC), and total non-aureus staphylococci count (TNAS), with farm-level factors in Bangladesh expressed as co-efficient (β), 95% confidence interval (95% CI), and P values

Models	Variable name	Categories	β ± SE	95% C. I.	P
Model 1: Bulk milk somatic cell count a
		Intercept	4.86 ± 0.09	4.67 to 5.04	< 0.001
	Season	Winter	Reference		< 0.001
		Late autumn	0.14 ± 0.09	-0.04 to 0.31
		Spring	0.51 ± 0.08	0.36 to 0.67
	Rearing system	Semi-Intensive	Reference		0.002
		Household	0.18 ± 0.08	0.01 to 0.34
		Free-range/bathan	0.21 ± 0.09	0.03 to 0.39
		Semi-bathan	0.24 ± 0.07	0.10 to 0.37
		Intensive	0.62 ± 0.17	0.27 to 0.97
Model 2: Total bacteria count b
		Intercept	4.59 ± 0.18	4.23 to 4.95	< 0.001
	Season	Late autumn	Reference		0.018
		Spring	0.54 ± 0.20	0.14 to 0.93
		Winter	0.63 ± 0.30	0.05 to 1.22
	The water source used for cleaning the milk containers	Tube-well water	Reference		0.026
		River water	0.22 ± 0.24	-0.25 to 0.68
		Pond water	0.50 ± 0.18	0.14 to 0.86
Model 3: Total non-aureus staphylococci count c
		Intercept	3.98 ± 0.12	3.75 to 4.22
	Geographical area of the farms	River basin	Reference		< 0.001
		Inland	0.38 ± 0.23	-0.08 to 0.84
		Coastal or semi-costal area	0.87 ± 0.18	0.51 to 1.22

^aBased on records from 116 buffalo farms

^bBased on records from 111 buffalo farms

^cBased on records from 109 buffalo farms