TABLE 3.

Frequencies of less common causes of chronic anterior uveitis, grouped by decade

Etiology	1975–1984	1985–1994	1995–2004
n (per decade)	362	552	686
Herpetic uveitis	4 (1.10%)	10 (1.81%)	11 (1.60%)
HLA-B27 uveitis	7 (1.93%)	21 (3.80%)	25 (4.53%)
Inflammatory bowel disease	3 (0.83%)	7 (1.27%)	23 (4.17%)
Multiple sclerosis	5 (1.38%)	11 (1.99%)	13 (2.36%)
Syphilis	19 (5.25%)	16 (2.90%)	8 (1.17%)

Note. The less common etiologies of chronic anterior uveitis that presented between 1975 and 2004 were grouped by decade to demonstrate the change over time. The greatest increase in frequency over time was measured in patients with a personal or family history of inflammatory bowel disease, while the greatest decrease was noted in patients with chronic anterior uveitis secondary to syphilis.