Table 3. Mean values of SCC and IMI pattern by mammary quarter location, breed, age, parity, lactation stage, and milk yield of dairy cows.

Factors	No. of quarters	SCC (×103 cells/ml) (Mean ± SEM)	Level of significance	No. of IMI positive quarters (%)	Level of significance
Front right	90	71.51 ± 12.11	p = 0.161	26 (28.9)	p = 0.072
Front left	90	76.20 ± 19.44		26 (28.9)
Rear right	90	97.78 ± 21.81		38 (42.2)
Rear left	90	138.27 ± 33.83		38 (42.2)
Front quarters	180	73.86 ± 11.42	p = 0.057	52 (28.9)	p = 0.008
Rear quarters	180	118.02 ± 20.13		76 (42.2)
Breed
Cross	240	97.51 ± 11.20	p = 0.533	88 (36.7)	p = 0.506
Indigenous	120	92.80 ± 26.76		40 (33.3)
Age (Years)
≤4	104	45.59 ± 6.73	p = 0.007	40 (38.5)	p = 0.699
>4-8	176	102.44 ± 13.64		62 (35.2)
>8	80	147.08 ± 41.22		26 (32.5)
Parity
1-2	200	68.76 ± 9.65	p = 0.004	64 (32.0)	p = 0.174
3-4	112	107.32 ± 19.36		42 (37.5)
≥5	48	182.63 ± 61.54		22 (45.8)
Lactation stage (days)
≤7	8	77.75 ± 6.56	p = 0.972	8 (100.0)	p = 0.001
>7-60	128	95.64 ± 23.73		46 (35.9)
>60	224	96.76 ± 12.87		74 (33.0)
Milk yield (L)
≤3	128	92.42 ± 25.12	p = 0.847	42 (32.8)	p = 0.644
>3-5	80	87.25 ± 21.29		28 (35.0)
>5	152	103.47 ± 13.67		58(38.2)