Objective. Raynaud's phenomenon (RP) is a common disorder, yet its incidence and natural history are unknown. Our objective was to determine the incidence and natural history of RP not associated with a connective tissue disease in a large, community-based population.Methods. Using serial examinations of the Framingham Heart Study offspring cohort, we collected data regarding RP symptoms for 717 women and 641 men over a 7-year period. We used validated criteria for RP classification and categorized participants as having incident, persistent, or remitted RP. We performed sex-specific analyses of RP status by age, body mass index, vibratory tool use, season of examination, state of residence, use of antihypertensive medications, and smoking status.Results. The mean ؎ SD age of participants was 53.5 ؎ 10 years. The incidence of RP was 2.2% in women (n ؍ 14) and 1.5% in men (n ؍ 9). Of the 78 women and 50 men who had RP at baseline, 36% of women (n ؍ 28) and 36% of men (n ؍ 18) had persistent RP. RP remitted in 64% of women (n ؍ 50) and 64% of men (n ؍ 32), with 41 women and 25 men meeting no or only 1 RP criterion at followup. RP episodes were infrequent and rarely interfered with daily activities.Conclusion. This is the first prospective study to determine the incidence and natural history of RP in a community-based cohort. Our data demonstrate that RP not associated with a connective tissue disease is frequently a transient phenomenon and rarely interferes with daily activities.Raynaud's phenomenon (RP) not associated with an underlying connective tissue disease is a common disorder characterized by reversible vasospasm of the extremities and is frequently induced by cold exposure. Results of population-based studies suggest that the prevalence of RP in the US ranges between 4% and 9% in women and between 3% and 6% in men (1-4).To date, there have been no studies defining the incidence or natural history of RP in the community. Due to the episodic nature of RP and variable disease severity and expression, it is unknown whether RP symptoms persist or resolve over time. In a retrospective study published in 1957, Gifford and Hines noted that of 307 women with RP followed up for a mean of 12 years, 38% noted no change in their symptoms, 36% improved, 16% worsened, and 10% noted disappearance of symptoms (5). However, this was a clinic-based sample and is therefore unlikely to represent the spectrum of disease in the community.The objectives of the current study were to determine the incidence of RP and to describe the natural history of this disorder, using a well-validated instrument in a large community-based population.
PATIENTS AND METHODSParticipants. Study subjects were participants in the Framingham Offspring Study cohort. Details describing this cohort have been published previously (6). Briefly, the Framingham Offspring Study cohort comprises children of the Dr.