Table 3 Cost-effectiveness of invitation strategies
Invitation | Participation ratea | Cost per invitation | ACERb | |
|---|---|---|---|---|
The First Phase | SMS staff time, sending SMS, phone calls | 22.54 | $0.35 | $1.55 |
Phone call staff time, phone call | 21.55 | $0.31 | $1.42 | |
Invitation letter staff time, letter paper, envelope, printing, sending the letter, phone calls | 27.04 | $0.37 | $1.37 | |
The Second Phase | Invitation letter staff time, letter paper, envelope, printing, sending the letter, phone calls | 33.72 | $0.41 | $1.22 |
Invitation letter plus video staff time, letter paper, envelope, printing, sending the letter, phone calls, internet | 20.47 | $0.41 | $2.01 |