. 2014 Jul;104(7):1294–1299. doi: 10.2105/AJPH.2014.301868

TABLE 4—

One-Way Sensitivity Analyses of Variables Included in the Annual Model

	Incremental Cost		Incremental Effectiveness^a
Variable	High	Low	High	Low
Probability of injury	−222	−223	0.0003	0.00005
Bussing costs	−1366	−2651	. . .^b	. . .^b
Risk reduction	−223	−227	0.0008	0.00002
HRQL	. . .^b	. . .^b	0.0008	0
Discount rate	−223	−224	0.001	0.0003

Note. HRQL = health-related quality of life. Variables are based on those used in the Markov model evaluating safe routes to school.

^{^a}

Incremental effectiveness was determined by quality-adjusted life years gained.

^{^b}

Changes in the variable had no impact on this outcome measure.