Regional variation of prevalence of primary Raynaud's phenomenon for general population studies including prevalence rates for males and females
| Country | Number of studies | Number of participants | Prevalence (%) | ||
|---|---|---|---|---|---|
| Male | Female | Total | |||
| USA* | 3 | 6 139 | 5.8 | 7.8 | 7.5 |
| France* | 1 | 1 102 | 6.3 | 11.75 | – |
| Spain | 1 | 276 | 2.8 | 3.4 | 3.3 |
| Turkey | 1 | 768 | 4.9 | 7.0 | 5.9 |
| Japan | 1 | 3 873 | 1.1 | 2.1 | 1.6 |
| Total | 6 | 12 158 | |||
*Median values calculated for prevalence. The US gender figures include data from Maricq et al31 (France and the USA). Total US prevalence figure includes data from two US-only studies.