Table 5 Mean Costs for each treatment group for each time period (95% confidence intervals)

Unadjusted costs

Baseline

$11,562

$6,377

$6,241

($3,039, $20,085)

($6,107, $6,648)

($6,016, $6,465)

Operative year (pre-, peri- and post-operative costs)

$17,719

$18,638

$16,879

($10,068, $25,370)

($17,943, $19,332)

($16,592, $17,167)

 Pre-operative

$564

$786

$558

($18, $1,110)

($707, $866)

($521, $595)

 Peri-operative

$6,301

$11,444

$10,555

($2,572, $10,030)

($11,038, $11,849)

($10,389, $10,721)

 Post-operative

$10,854

$6,408

$5,766

($3,573, $18,136)

($5,924, $6,891)

($5,550, $5,982)

Change in costs from baseline to operative year

$6,157

$12,260

$10,638

(−$5,294, $17,608)

($11,565, $12,955)

($10,351, $10,925)

Regression adjusted costs ^*

Baseline

$9,901

$8,048

$6,991

($5,562, $17,628)

($7,673, $8,439)

($6,691, $7,302)

Operative year (pre-, peri- and post-operative costs)

$19,763

$25,019

$20,407

($10,425, $38,694)

($23,738, $26,376)

($19,483, $21,381)

 Pre-operative

$556

$1,040

$629

($19, $6,087)

($779, $1,388)

($485, $815)

 Peri-operative

$7,626

$16,261

$13,938

($187, $10,829)

($11,799, $22,400)

($10,330, $18,808)

 Post-operative

$11,581

$7,718

$5,840

($4,360, $30,765)

($7,122, $8,372)

($5,427, $6,279)

Change in costs from baseline to operative year

$9,862

$16,971

$13,416

(−$435, $20,159)

($15,636, $18,306)

($12,445, $14,387)