Table III.
Cost Components by CPM Status
| Characteristic | CPM = No | CPM = Yes | Difference | P Value* | |||
|---|---|---|---|---|---|---|---|
| Mean | SE | Mean | SE | Mean | SE | ||
| Cost difference between CPM and No-CPM (452 pairs) | |||||||
| Professional costs | $15,250 | $373 | $18,823 | $340 | $3,573 | $455 | <0.001 |
| Technical costs | $45,318 | $1,423 | $49,494 | $1,398 | $4,176 | $1,724 | 0.001 |
| Total costs | $60,568 | $1,713 | $68,317 | $1,650 | $7,749 | $2,069 | <0.001 |
| Cost difference between immediate CPM and No-CPM (398 pairs) | |||||||
| Professional costs | $14,937 | $395 | $18,283 | $350 | $3,346 | $480 | <0.001 |
| Technical costs | $44,330 | $1,520 | $47,513 | $1,504 | $3,182 | $1,877 | 0.033 |
| Total costs | $59,268 | $1,823 | $65,796 | $1,767 | $6,528 | $2,243 | 0.001 |
| Cost difference between delayed CPM and No-CPM (54 pairs) | |||||||
| Professional costs | $17,555 | $1,086 | $22,801 | $1,079 | $5,245 | $1,406 | <0.001 |
| Technical costs | $52,596 | $3,953 | $64,095 | $3,112 | $11,499 | $4,011 | <0.001 |
| Total costs | $70,152 | $4,858 | $86,896 | $3,752 | $16,744 | $5,017 | <0.001 |
*
P values were based on a paired non-parametric (Wilcoxon signed rank) test. P-values are for testing the differences to be zero between CPM and no CPM