Table 6 Sensitivity analysis of participants whose back pain decreased, with the respective difference-in-difference (DiD) estimator (ATT) and its standard error (SE) in the baseline and follow-up period
Low cost (0.1-0.5 quantile) | MBR (n =24) | Control (n=10) | DiD | |||
Item | Baseline | Follow-up | Baseline | Follow-up | ATTa | SE |
Total cost (€) | 9699 | 10239 | 8821 | 6904 | 2457 | 1926 |
 Back pain-related cost (€) | 2054 | 1348 | 1369 | 1426 | -763 | 790 |
 Inpatient cost – back pain (€) | 377 | 72 | 0 | 207 | -512 | 470 |
 Outpatient cost – back pain (€) | 1676 | 1276 | 1369 | 1220 | -250 | 677 |
Sick leave in last 6 months due to back painb | 32.8 | 8.8 | 33.8 | 14.5 | -5.7 | 6.04 |
Overall health status (EQ-5D)b | 0.607 | 0.745 | 0.607 | 0.634 | 0.111* | 0.04 |
High cost (0.5-0.9 quantile) | MBR (n=25) | Control (n=24) | DiD | |||
Item | Baseline | Follow-up | Baseline | Follow-up | ATTa | SE |
Total cost (€) | 23749 | 13555 | 23420 | 19283 | -5787†| 3266 |
 Back pain-related cost (€) | 7588 | 3081 | 6292 | 4500 | -2676 | 2130 |
 Inpatient cost – back pain (€) | 2700 | 0 | 2840 | 196 | -56 | 1496 |
 Outpatient cost – back pain (€) | 4888 | 3081 | 3453 | 4264 | -2620†| 1519 |
Sick leave in last 6 months due to back painb | 44.45 | 9.42 | 44.35 | 27.73 | -18†| 6.7 |
Overall health status (EQ-5D)b | 0.542 | 0.717 | 0.542 | 0.678 | 0.039 | 0.03 |