Table 2. Contact duration (hours) between horses on selected study days.

The cells below the diagonal represent contacts that occurred on day 1 of the study, while the cells above the diagonal represent contacts that occurred on day 3 of the study. Highlighted cells indicate horses whose stalls were in the same area in the barn (Fig 1). All of the contact durations on the bottom half of the table represent the contacts that occurred on day 1 (Tuesday) of the study, while the contacts above the diagonal represent contacts that occurred on day 4 of the study (Thursday). The contact duration between the horses that were in the same area in the barn tended to be longer in than between the other horses.

Contact event duration (hours)		Horse
		1	2	3	4	5	6	7	8	9
Horse	1			0.05	6.11	0.67	<0.00	0.01	0.89
	2	<0.00		5.63	0.23		4.12	<0.00	5.73
	3	<0.00	0.69		0.17		6.24
	4	0.24	11.89	0.31			<0.00		21.76
	5	2.82	<0.00	<0.00			0.23	1.31		5.44
	6	2.18	1.31	0.46		0.11		0.15	<0.00	0.02
	7	0.23				0.24	15.04			13.92
	8	0.23	15.75	0.19	15.92		<0.00
	9	0.13			0.01	2.30	3.82	15.58	<0.00