Table 2.

Observed and expected deaths due to stroke

	Residents of the Buckle	Visitors to the Buckle	Residents away from the Buckle
Number of stroke deaths
Observed	36,072	2,570	2,244
Expected	27,698	2,298	2,496
Observed – expected	8,374	272	−129
Total (all deaths)	365,907	30,951	30,330
Percentage of strokes
Observed	9.9	8.3	7.4
Expected	7.6	7.4	8.2
Stroke PMR	130.2∗	111.9∗	89.9∗
95% confidence interval	128.9–131.6	107.5–116.2	86.2–93.6

^∗p < 0.0001: significantly different from 100; two-tailed test.