Summary sensitivity and specificity with 95% confidence interval

[Mmhr]

Good day,

I'm an ophthalmologist registrar busy with a thesis. I am doing a diagnostic meta-analysis of some tests, and have a table with one test's sensitivity and specificity data from different studies. I also have the true and false positives and negatives.

Is it possible to calculate a summary sensitivity and specificity (with 95% confidence interval) for the test?

A partial example below.

Regards

Test A
Study	True +	False +	False -	True -	N	sensitivity	Specificity
1	50	59	6	475	590	0.89	0.89
2	42	111	4	157	314	0.91	0.59
3	17	3	91	81	192	0.16	0.96
4	14	144	2	250	410	0.88	0.63
		123	317	103	963	1506
	Summary or combined value?					?	?
	Combined 95% confidence interval?