Source: Annual Congress 2009 - Socio-economic and epidemiological aspects of sleep apnoea
Disease area: Sleep and breathing disorders

Abstract

Background:
Interethnic differences in health morbidity & usage of health resources exist in the UK but it is unclear if there are differences in CPAP usage in patients with obstructive sleep apnoea (OSA) in these different groups. If differences do exist, this may contribute towards the prevalent disparity in cardiovascular outcomes between these groups.
Aim: To investigate if there are significant differences in compliance with CPAP therapy in two ethnic populations with OSA.
Methods: CPAP compliance data over a period of 1 year at a tertiary centre was collected. The last 50 consecutive South Asian and Caucasian patients as available in June 2008 were selected. Ethnicity was crosschecked with demographics data. Data on age, gender, BMI, Epworth Sleepiness Score (ESS), Apnoea Hypopnoea Index (AHI) or Oxygen Desaturation Index (ODI) were obtained.
Results: Data are given as median (inter-quartile range). NS = not significant.

Patient characteristics and CPAP usage

	All patients	S. Asian	Caucasian	P value
Age	54 (49-62)	53 (49-58)	50 (49-63)	NS
Males (%)	82	82	82	NS
BMI	33.6 (30-41)	34.8 (30-39)	33 (30-41)	NS
ESS	14 (9-16)	14.5 (11-19)	13 (8-16)	NS
Mod to severe OSA (%)	75	74	76	NS
Total hrs CPAP (in 1 yr)	1669	1647	1754	NS
CPAP use/ night (hrs)	4.3 (0.5-6.5)	4.2 (0.2-5.6)	4.7 (1.1-6.8)	p=0.07
CPAP use/ night <4 hrs (%)	45	48	42	NS
CPAP use/ night < 1 hrs (%)	27	32	22	NS

Conclusions: Both groups were well matched. Although the average use of CPAP was less in South Asians, this did not reach statistical significance (p=0.07). If interethnic CPAP usage differences truely exist, further studies exploring the reasons why are warranted.

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Citations should be made in the following way:
A. Lal, A. D. Vellore, S. Madathil, D. Banerjee (Birmingham, United Kingdom). Compliance with CPAP: are there differences between south asian and caucasian patients with osa?. Eur Respir J 2009; 34: Suppl. 53, 3666

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