Assessment of the level of asthma control among adult patients in two tertiary care centers in Nigeria.

BACKGROUND: According to the Global Initiative for Asthma (GINA) guidelines, the goal of asthma management is to achieve clinical control. Uncontrolled asthma places a significant social and economic burden on patients.

OBJECTIVE: The two aims of this study were to (1) assess the level of asthma control (according to the GINA definition of "control") among adult patients attending two tertiary care centers in Nigeria and (2) to determine the predictors associated with uncontrolled asthma.

METHODS: This cross-sectional study was carried out from June 2009 to December 2010. The participants were all 18 years old or older with physician-diagnosed asthma. First, the participants completed an interviewer-administered questionnaire, which included items that collected their socio-demographic information and clinical data. Second, anthropometric indices were measured and spirometry was conducted to determine each participant's lung function. Finally, the researcher team members assessed each participant's inhaler device technique. The outcome measures were (1) uncontrolled asthma, (2) partly controlled asthma, and (3) controlled asthma.

RESULTS: One hundred and twenty-four asthma patients participated in the study. Of these, 69.3% had uncontrolled asthma, 22.6% had partly controlled asthma, and 8.1% had controlled asthma. Multivariate analysis showed that uncontrolled asthma was strongly associated with asthma severity based on clinical features, the incorrect use of an inhaler device, the use of oral corticosteroids, an abnormal pulmonary function test, the presence of comorbidity, and the lack of adherence to inhaled corticosteroids (ICSs). The results also revealed that increasing age and a lack of tertiary education were weakly associated with asthma control. In this study, gender, marriage, smoking status, occupation, socioeconomic status, income, and the duration of the asthma were not associated with asthma control.

CONCLUSION: A significant proportion of the sampled patients had uncontrolled asthma. To reduce this number, health care providers must reinforce the education of each asthma patient and promote the regular assessment of asthma control at every clinic visit, identify those with poor control, and institute the appropriate therapy needed to achieve clinical control.