Scotland (1954-68) | New York (1959-69) | Israel (1973-82) | France (1960-95) | Thailand (1982-92) | Greece (1984-90) | Spain (1988-97) | Singapore (1994-97) | |
Idiopathic/unknown | 17% | 28% | 32% | 55% | 72% | 35% | 34% | 60% |
Sarcoidosis | 14% | 24% | 1 patient | 11% | 0% | 28% | 22% | 0% |
Streptococcal infection | 48% | 14% | 44% | 28% | 6% | 6% | 7% | 9% |
TB | 20% | 1 patient | 1 patient | 1 patient | 12% | 1.5% | 5% | 3% |
Infections other than TB or strep¶ | 1 patient | 9% | 0% | 2.5% | 0% | 11% | 22% | 21% |
Pregnancy or OCAs | 0% | 0% | 10% | 3% | 0%Δ | 10% | 1 patient | 4% |
Drugs other than OCAs | 0% | 6% | 6% | 0% | 7% | 4% | 2% | 0% |
Inflammatory bowel disease | 0% | 16% | 1 patient | 1.5% | 0% | 0% | 3% | 0% |
Behcet syndrome | 0% | 0% | 0% | 0% | 3% | 4% | 2% | 3% |
Other◊ | 1 patient | 7% | 1 patient | 0% | 0% | 1 patient | 3% | 0% |