Table 7 Sensitivity analysis of two scenarios (intention-to-treat and original evaluation study), with the difference-in-difference (DiD) estimator (ATT) and its standard error (SE)
Intention-to-treat (1) | Overall n= 136 (MBR) and 137 (controls) | Minor impairment n= 74 (MBR) and 80 (controls) | Major impairment n = 62 (MBR) and 57 (controls) | |||
Item | ATTa | SE | ATTa | SE | ATTa | SE |
Total cost (€) | 755 | 2447 | 2981 | 2864 | -1762 | 4249 |
 Back pain-related cost (€) | -128 | 677 | 569 | 882 | -959 | 1019 |
 Inpatient cost – back pain (€) | 231 | 535 | 971 | 697 | -704 | 824 |
 Outpatient cost – back pain (€) | -359 | 381 | -402 | 498 | -256 | 562 |
Sick leave in last 6 months due to back painb | -13.58* | 3.13 | -7.24†| 2.9 | -22.04* | 6.24 |
Overall health status (EQ-5D)b | 0.027 | 0.01 | 0.024 | 0.02 | 0.025 | 0.02 |
Original evaluation study (2) | Overall n= 186 (MBR) and 249 (controls) | Minor impairment n= 88 (MBR) and 147 (controls) | Major impairment n= 98 (MBR) and 102 (controls) | |||
Item | ATTa | SE | ATTa | SE | ATTa | SE |
Total cost (€) | 2845 | 2365 | 5330†| 2990 | 1217 | 3811 |
 Back pain-related cost (€) | 537 | 869 | 1022 | 1046 | 488 | 1451 |
 Inpatient cost – back pain (€) | 650 | 690 | 1078 | 825 | 540 | 1185 |
 Outpatient cost – back pain (€) | -113 | 380 | -56 | 517 | -53 | 566 |
Sick leave in last 6 months due to back painb | -12.7** | 2.53 | -4.68 | 9.42 | -22.84** | 4.95 |
Overall health status (EQ-5D)b | 0.030* | 0.01 | 0.011 | 0.01 | 0.048* | 0.02 |