borderline significantP = 0.05
Compared with palbociclib, incremental initial period costs were higher (borderline significant) for abemaciclib (incremental cost: $5,556 [95% CI: -$71 to $11,183], P = 0.05) and not statistically different for ribociclib (incremental cost: $1,769 [95% CI: -$2,602 to $6,139], P = 0.43).