Table 2.

Differences Between Follow-Up and No Follow-Up Populations

Age (y)	Follow-Up		No Follow-Up		P Value
	Mean	SD	Mean	SD	2.60 × 10−3
	74.04	11.08	68.42	13.18
Sex (female)	Follow-Up		No Follow-Up		P Value
	Count	%	Count	%	2.90 × 10−4
	88	91.7	55	70.5