The risk for depression in patients with ankylosing spondylitis: a population-based cohort study. Meesters, J. J. L., Bremander, A., Bergman, S., Petersson, I. F., Turkiewicz, A., & Englund, M. 16(5):418.
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INTRODUCTION: Depression is frequent in ankylosing spondylitis (AS) patients. However, epidemiological data about the potential increase in risk are lacking. This study compares the rate of doctor-diagnosed depression in a well defined cohort of AS patients to the general population seeking care. METHODS: The Skane Healthcare Register comprises healthcare data of each resident in Region Skane, Sweden (population 1.2 million), including ICD-10 diagnoses. Using physician coded consultation data from years 1999 to 2011, we calculated depression consultation rates for all AS patients. We obtained standardized depression-rate ratios by dividing the observed depression rate in AS patients by the expected rate based on the corresponding age- and sex-specific rates of depression in the general population seeking care. A ratio \textgreater 1 equals a higher rate of depression among AS patients. RESULTS: The AS cohort consisted of 1738 subjects (65% men) with a mean age of 54 years. The reference population consisted of 967,012 subjects. During the 13-year observation period 10% (n = 172) of the AS cohort had a doctor-diagnosed depression compared to 6% (n = 105) to be expected. The standardized estimate of depression-rate ratio was 1.81 (95% confidence interval 1.44 to 2.24) in women men and 1.49 (1.20 to 1.89) in men. CONCLUSIONS: The rate of doctor-diagnosed depression is increased about 80% in female and 50% in male AS patients. Future challenges are to timely identify and treat the AS patients who suffer from depression.
@article{meesters_risk_2014,
	title = {The risk for depression in patients with ankylosing spondylitis: a population-based cohort study.},
	volume = {16},
	issn = {1478-6362 1478-6354},
	doi = {10.1186/s13075-014-0418-z},
	abstract = {{INTRODUCTION}: Depression is frequent in ankylosing spondylitis ({AS}) patients. However, epidemiological data about the potential increase in risk are lacking. This study compares the rate of doctor-diagnosed depression in a well defined cohort of {AS} patients to the general population seeking care. {METHODS}: The Skane  Healthcare Register comprises healthcare data of each resident in Region Skane, Sweden (population 1.2 million), including {ICD}-10 diagnoses. Using physician coded consultation data from years 1999 to 2011, we calculated depression consultation rates for all {AS} patients. We obtained standardized depression-rate  ratios by dividing the observed depression rate in {AS} patients by the expected rate based on the corresponding age- and sex-specific rates of depression in the  general population seeking care. A ratio {\textgreater} 1 equals a higher rate of depression among {AS} patients. {RESULTS}: The {AS} cohort consisted of 1738 subjects (65\% men) with a mean age of 54 years. The reference population consisted of 967,012 subjects. During the 13-year observation period 10\% (n = 172) of the {AS} cohort had a doctor-diagnosed depression compared to 6\% (n = 105) to be expected. The standardized estimate of depression-rate ratio was 1.81 (95\% confidence interval  1.44 to 2.24) in women men and 1.49 (1.20 to 1.89) in men. {CONCLUSIONS}: The rate  of doctor-diagnosed depression is increased about 80\% in female and 50\% in male {AS} patients. Future challenges are to timely identify and treat the {AS} patients who suffer from depression.},
	pages = {418},
	number = {5},
	journaltitle = {Arthritis research \& therapy},
	shortjournal = {Arthritis Res Ther},
	author = {Meesters, Jorit J. L. and Bremander, Ann and Bergman, Stefan and Petersson, Ingemar F. and Turkiewicz, Aleksandra and Englund, Martin},
	date = {2014},
	pmid = {25209603},
	pmcid = {PMC4180137},
	keywords = {Adult, Aged, Cohort Studies, Comorbidity, Depression/diagnosis/*epidemiology, Female, Humans, International Classification of Diseases, Male, Middle Aged, Population Surveillance/methods, Referral and Consultation/*statistics \& numerical data, Registries/*statistics \& numerical data, Risk Factors, Sex Factors, Spondylitis, Ankylosing/*epidemiology, Sweden/epidemiology}
}

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