Table 4.

Subgroup analysis of mean difference of BASDAI score in spondyloarthritis patients with and without uveitis of the included studies.

Subgroup	Mean difference	95% CI	p value	I2 (%)	n*
Delay diagnosis
≤ 5 years	− 0.23	− 0.40 to − 0.07	0.005	0	3
> 5 years	0.15	− 0.22 to 0.51	0.43	67	4
Diagnostic criteria
NY	0.38	− 0.15 to 0.92	0.16	36	3
ESSG	0.04	− 0.23 to 0.31	0.79	31	4
Study design
Cross-sectional	0.69	0.23 to 1.16	0.003	0	3
Cohort	0.03	− 0.14 to 0.20	0.72	76	10
Sample size
≤ 500 patients	0.62	0.10 to 1.13	0.02	73	6
> 500 patients	− 0.05	− 0.21 to 0.10	0.50	63	7
% male
> 70%	0.33	− 0.14 to 0.79	0.17	64	4
≤ 70%	0.05	− 0.16 to 0.26	0.63	79	8

*Number of study.