Table 4.

Sensitivity and scenario analyses for a one-off national-level mass media campaign to promote smartphone apps for physical activity (expected value analysis, lifetime perspective, 3% discount rate, unless otherwise stated).

Sensitivity/scenario analysesa	Health gain (QALYsb)	Net health system costs (NZ $)	Cost per QALY gained: ICERb (NZ $)
Base case analysis	33	2,315,000	81,000
Target age range set to 40-80 years of age (otherwise base case)	30	2,387,000	80,000
5-year maintenance of additional physical activity levels followed by a return to preintervention levels (otherwise base case)	126	241,146	2000
0% discount rate	57	2,153,000	38,000
6% discount rate	22	2,332,000	108,000

^aExpected values given for all scenarios.

^bQALY: quality-adjusted life year.

^cICER: incremental cost-effectiveness ratio.