TABLE 3.

Life Expectancy and Quality-Adjusted Life Expectancy (QALE) in Years, by Outcome at Discharge and Helmet Use: Taiwan, 2001–2007

	Life Expectancy		QALE
	80-Month Follow-Up, Mean or Mean (SE)	50-Year Extrapolation, Mean or Mean (SE)	80-Month Follow-Up, Mean or Mean (SE)	50-Year Extrapolation, Mean or Mean (SE)
Good outcome at discharge
Head injury patients	6.4** (0.03)	36.7* (6.2)	5.9** (0.5)	35.3** (5.8)
Reference population		38.0* (0.02)		38.0** (0.02)
Difference		1.3		2.8
Poor outcome at discharge
Head injury patients	4.1** (0.2)	9.6* (5.6)	2.9** (0.2)	7.6** (4.6)
Reference population		34.0* (0.03)		33.9** (0.7)
Difference		24.4		26.3
Helmeted motorcyclists with head injury
87.2% good outcome + 12.8% bad outcome	6.1	33.2	5.5	31.7
Expected life loss relative to reference population		4.3		5.8
Nonhelmeted motorcyclists with head injury
66.4% good outcome + 33.6% bad outcome	5.7	27.6	4.9	25.9
Expected life loss relative to reference population		9.1		10.7

*P < .01; **P < .001, for between-group comparison of good versus poor outcome at discharge. Between-group differences were assessed via the log-rank test (80-month follow-up) and the z statistic (50-year extrapolation).