Table 3.

Mean time differences by body mass index category compared with normal body mass index

Paired comparison	Difference mins (95% CI)*	p Value
Total theatre time
Normal—underweight	2.7 (−3.6 to 9.0)	1.000
Overweight—normal	4.7 (1.3 to 8.2)	0.001
Obese—normal	7.7 (4.1 to 11.3)	<0.001
Super-obese—normal	19.8 (13.4 to 26.2)	<0.001
Surgical time
Normal—underweight	1.6 (−3.2 to 6.4)	1.000
Overweight—normal	2.9 (0.3 to 5.6)	0.017
Obese—normal	4.9 (2.2 to 7.7)	<0.001
Super-obese—normal	8.7 (3.8 to 13.7)	<0.001
Anaesthesia time
Normal—underweight	1.1 (−2.9 to 5.1)	1.000
Overweight—normal	1.8 (−0.38 to 3.95)	0.207
Obese—normal	2.8 (0.5 to 5.1)	0.006
Super-obese—normal	11.1 (7.0 to 15.1)	<0.001

*Bonferroni adjusted.