Table II. Pre-operative profile of the two groups of patients.

		TBRHE	TBRTHP
Cases		5	7
M/F		5/0	7/0
Age (yrs)	Mean	56.2	53.3
	σ	6.1	6.4
BMI	Mean	37.3	29.1
	σ	4.1	1.9
AHI pre	Mean	68.4	54.5
	σ	7.9	14.2
LOS pre	Mean	59.0	63.7
	σ	10.6	9.4
ESS pre	Mean	16.8	11.6
	σ	4.5	2.9

BMI: Body Mass Index; AHI: Apnoea-Hypopnoea Index; LOS: Lowest O2 Sat; ESS: Epworth Sleepiness Scale; σ: Standard Deviation