Demographic, Social and Clinical Correlates of Raynaud Phenomenon

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Abstract
Our study has identified the demographic, social and clinical correlates of primary Raynaud phenomenon (RP) from a case-control study involving 235 subjects who were identified from a population-based prevalence survey of RP. All potential cases and a sampling of probable non-cases, identified by a screening questionnaire, were invited to a medical clinic for diagnostic testing and assignment of case or control status. Odds ratios (OR) for risk indicators for primary RP were estimated using multiple logistic regression to obtain 95% confidence intervals. The regression yielded statistically significant (p<0.05) positive associations for sex (OR = 3.0 for females versus males), self-reported alcohol use (OR = 1.1) and diastolic blood pressure (OR = 1.2) in those on anti-hypertensive medication. A significant (p = <0.01, OR = 0.4) negative association was found for Quetelet index (a measure of obesity). Near-significant or suggestive but non-significant negative associations were found between RP and marital status (p = 0.05, OR = 2.5), increased years of education and, for those on antihypertensive medication, higher systolic blood pressure (both p = 0.07).

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