Table 4.

Proportion of patients characterised by the four significant factors^*

Factors present	Patients stayed ≤ 2 weeks		Patients stayed > 2 weeks
	n/N	%	n/N	%
None	27/546	4.9	0/124	0
One	215/546	39.4	12/124	9.7
Two	222/546	40.6	57/124	46.0
Three	75/546	13.7	46/124	37.1
Four	7/546	1.3	9/124	7.3

^*Aged 70 years or older; anaesthetic fitness, ASA 3 or ASA 4; operating time ≥ 2 h; and incision > 10 cm.