Table 2.

Univariate analysis to assess effect of patient/clinicopathological factor and fluid volumes on all-cause morbidity

Factor	P value	Odds ratio	Confidence interval
Sex	0.48	0.73	0.31–1.72
Age (years):  < 50  50–70  > 70	0.29 0.36 0.73	2.09 0.71 1.14	0.51–8.51 0.34–1.48 0.53–2.46
Tumour height:  0–5cm  5.1–10cm  10.1–15cm	0.89 0.36 0.43	0.95 1.42 0.73	0.45–1.98 0.66–3.08 0.33–1.6
Neoadjuvant radiotherapy	0.22	0.58	0.24–1.39
Surgery type:  Anterior resection  Abdominoperineal resection	0.23 0.83	1.61 0.91	0.73–3.56 0.36–2.25
Surgical method:  Open  Laparoscopic	0.67 0.67	1.17 0.85	0.54–2.56 0.39–1.84
ASA grade:  I  II  III	0.53 0.41 0.16	0.71 0.73 1.85	0.24–2.09 0.34–1.54 0.78–4.43
Fluids ≥ 3500ml	0.008	2.7	1.27–5.70