National Knowledge-Driven Management of Obstructive Sleep Apnea-The Swedish Approach.

INTRODUCTION: This paper describes the development of "Swedish Guidelines for OSA treatment" and the underlying managed care process. The Apnea Hypopnea Index (AHI) is traditionally used as a single parameter for obstructive sleep apnea (OSA) severity classification, although poorly associated with symptomatology and outcome. We instead implement a novel matrix for shared treatment decisions based on available evidence. METHODS: A national expert group including medical and dental specialists, nurses, and patient representatives developed the knowledge-driven management model. A Delphi round was performed amongst experts from all Swedish regions (N = 24). Evidence reflecting treatment effects was extracted from systematic reviews, meta-analyses, and randomized clinical trials. RESULTS: The treatment decision in the process includes a matrix with five categories from a "very weak"" to "very strong" indication to treat, and it includes factors with potential influence on outcome, including (A) OSA-related symptoms, (B) cardiometabolic comorbidities, (C) frequency of respiratory events, and (D) age. OSA-related symptoms indicate a strong incitement to treat, whereas the absence of symptoms, age above 65 years, and no or well-controlled comorbidities indicate a weak treatment indication, irrespective of AHI. CONCLUSIONS: The novel treatment matrix is based on the effects of treatments rather than the actual frequency of respiratory events during sleep. A nationwide implementation of this matrix is ongoing, and the outcome is monitored in a prospective evaluation by means of the Swedish Sleep Apnea Registry (SESAR).

Blood pressure and other cardiovascular risk factors among treated hypertensives in Swedish primary health care.

OBJECTIVE: To evaluate antihypertensive treatment and other cardiovascular risk factors in primary health care. DESIGN: Cross-sectional survey of consecutive patients with treated hypertension in 1999. SETTING: 17 primary care centres in Sweden. SUBJECTS: 512 patients (mean age 67; SD 11 years). MAIN OUTCOME MEASURES: Antihypertensive treatment, cardiovascular risk factors. RESULTS: Patients with high diastolic BP (> or = 100 mmHg) and systolic BP (> 180 mmHg) values were few. The proportions with diastolic BP < 90, BP < 160/95 and < 140/90 mmHg were 64%, 54% and 15%. Mono-therapy was given in 51%, and > or = 3 drugs in 13%. Hypertensives with hyperlipidaemia were 42%, and only 26% of them were given lipid-lowering drugs, mainly statins, 21%. Smokers were 10%, 23% had diabetes, and many had overweight BMI = 25 kg/m2, 72%. CONCLUSION: Although two-thirds had diastolic BP < 90 mmHg, few had BP below the current treatment target < 140/90 mmHg. More than half of the hypertensives had at least one additional cardiovascular risk factor, and these hypertensives also had low proportions within several current treatment targets of hypertension and hyperlipidaemia, implying a need for intensified multiple risk factor intervention.