| Power = 80% | Power = 90% | ||||
---|---|---|---|---|---|---|
Aim 1 | RR = 0.50 | RR = 0.60 | RR = 0.70 | RR = 0.50 | RR = 0.60 | RR = 0.70 |
P0 = 0.10 | 435 | 721 | 1,356 | 582 | 965 | 1,814 |
P0 = 0.13 | 326 | 540 | 1,014 | 436 | 723 | 1,356 |
P0 = 0.16 | 258 | 427 | 800 | 345 | 571 | 1,070 |
Aim 2 | RD = 0.01 | RD = 0.014 | RD = 0.018 | RD = 0.01 | RD = 0.014 | RD = 0.018 |
P0 = 0.02 | 2,319 | 1,027 | 526 | 3,103 | 1,374 | 704 |
P0 = 0.03 | 3,826 | 1,799 | 995 | 5,121 | 2,048 | 1,332 |
P0: the RD of PTB in IPNC group; RR: relative risk |