. 2021 Nov 3;8:742696. doi: 10.3389/fvets.2021.742696

Table 7.

Regression analysis of the proportion of samples positive for environmental mastitis pathogens by month.

Categories of explanatory variable month	Outcome as proportion of samples positive for each of the mastitis pathogens
	*Non-aureus* Staphylococci**	*Escherichia coli*	*Trueperella pyogenes*	*Streptococcus dysgalactiae*

	Odds ratio (95% confidence interval)	Odds ratio (95% confidence interval)	Odds ratio (95% confidence interval)	Odds ratio (95% confidence interval)
	Overall P-value ≤ 0.01	Overall P-value ≤ 0.01	Overall P-value ≤ 0.01	Overall P-value ≤ 0.01
January	1.00	1.00	1.00	1.00
February	0.93 (0.77, 1.12)	0.66 (0.49, 0.90)^*	0.95 (0.75, 1.2)	0.65 (0.47, 0.90)^*
March	1.64 (1.39, 1.93)^*	0.9 (0.68, 1.19)	0.97 (0.77, 1.22)	1.67 (1.30, 2.17)^*
April	2.08 (1.77, 2.44)^*	0.82 (0.61, 1.10)	1.12 (0.89, 1.41)	1.39 (1.07, 1.82)^*
May	1.37 (1.16, 1.64)^*	1.53 (1.18, 1.98)^*	0.98 (0.78, 1.25)	1.27 (0.96, 1.67)
June	1.5 (1.28, 1.78)^*	1.65 (1.30, 2.11)^*	0.83 (0.65, 1.05)	1.06 (0.81, 1.40)
July	2.29 (1.97, 2.67)^*	1.68 (1.33, 2.13)^*	0.72 (0.57, 0.91)^*	0.83 (0.63, 1.09)
August	1.75 (1.5, 2.05)^*	1.74 (1.38, 2.21)^*	0.69 (0.55, 0.87)^*	0.93 (0.71, 1.22)
September	1.65 (1.41, 1.95)^*	1.78 (1.40, 2.27)^*	0.69 (0.54, 0.89)^*	0.88 (0.66, 1.18)
October	1.09 (0.91, 1.3)	1.42 (1.10, 1.83)^*	0.86 (0.68, 1.1)	0.9 (0.67, 1.20)
November	0.98 (0.81, 1.19)	1.48 (1.14, 1.92)^*	1.05 (0.83, 1.33)	1.05 (0.78, 1.40)
December	0.8 (0.65, 0.99)^*	1.12 (0.84, 1.50)	0.96 (0.74, 1.23)	1.1 (0.81, 1.48)

Represent significant odds ratios.