Table 2.

Variables related to feeding and management categories associated with diarrhoea in the univariable model of diarrhoea in 3047 French beef calves in 92 herds (December 1995–April 1996)

Variable	Levels	Sample		Diarhoea		$P$
		N	%	Cases	%
Feeding concentrate	Yes	31	33.7	123	27.9	>0.001
	No	61	66.3	323	72.1
Feeding corn silage	Yes	41	44.5	189	42.9	0.003
	No	51	55.5	257	57.1
Feeding grass silage	Yes	57	61.9	270	61.3	0.001
	No	35	38.1	176	38.7
Quantities of feed	Free	22	23.9	107	24.3	0.33
	Restricted	70	76.1	339	75.7
Different diet for pregnant and lactating cows	Yes	42	45.6	178	40.4	0.02
	No	50	54.4	268	59.6
Different diet between primiparous and multiparous	Yes	29	31.5	153	34.7	0.80
	No	63	68.5	293	65.3
Flushing used	Yes	16	17.4	76	17.3	0.26
	No	76	82.6	370	82.7
Type of housing	Free-loose	47	51.1	193	43.8	0.49
	Tie stall-tethered	45	48.9	253	56.2
Adequate ventilation of building	Yes	49	53.2	206	46.8	0.74
	No	43	46.8	240	53.2
Presence of ammonia detected by technician	No	86	93.4	394	89.5	0.002
	Yes	6	6.6	52	10.5
Building dampness estimated by technician	No	86	93.4	396	90.0	0.003
	Yes	6	6.6	50	10.0
Nursing (quarantine) location for adults	Yes	25	27.1	80	18.2	0.03
	No	67	72.9	366	81.8
Nursing (quarantine) location for calves	Yes	31	33.7	115	26.1	0.006
	No	61	66.3	331	73.9
Calf stocking	Sufficient	61	66.3	258	58.6	>0.001
	Insufficient	31	33.7	188	41.4
Animals grouped on lot	Yes	74	80.4	375	85.2	0.02
	No	18	19.6	71	14.8
Calf location	Hutches-group pen	10	10.8	54	12.3	0.10
	Individual tied	67	72.8	319	72.5
	Free	15	16.4	73	15.2
Calving grouped in winter	Yes	42	45.6	255	57.9	0.83
	No	50	54.4	191	42.1
Incidence of diarrhoea in the last season	>5%	28	30.4	78	17.7	<0.001
	$\ge$5 %	64	69.6	368	82.3