The tables below show two different study result data of person time and disease status among 10 subjects followed for 40 years. No individuals initially had the disease in both of the studies.

Which study (Study A or Study B) shows the higher incidence rate of the disease over the study period? Why?

Study A

Subject	Years Contributed	Developed Disease? (0 no / 1 yes)
1	35	1
2	20	1
3	40	0
4	30	1
5	10	0
6	25	1
7	40	0
8	25	0
9	35	0
10	40	1
Total	300	5

Study B

Subject	Years Contributed	Developed Disease? (0 no / 1 yes)
1	5	1
2	10	0
3	10	0
4	15	1
5	20	0
6	30	1
7	10	0
8	20	0
9	10	0
10	20	0
Total	150	3