Based on data from the age-stratified tables below, what is the risk ratio (relative risk) for young people and old people?

YOUNG
		CHD	No CHD	Total
High Blood Pressure	Yes	25	3,775	4,000
No	15	4,985	5,000
	Total	40	8,760	9,000

OLD
		CHD	No CHD	Total
High Blood Pressure	Yes	200	5,800	6,000
No	70	4,930	5,000
	Total	270	10,730	11,000

Do the data provide evidence of effect modification based on the ratio scale? Yes or no