Table 2

Mean cost (in euros) per patient receiving PTED and open microdiscectomy and mean cost differences between groups during follow-up

Cost categoryPTED n=179, mean (SEM)OM n=309, mean (SEM)Cost difference, crude mean (95% CI)Cost difference, adjusted mean (95% CI)
Direct costs
 Surgery45004095405405
 Primary care632 (77)918 (78)−287 (−476 to −67)−307 (−497 to −102)
 Secondary care725 (186)1061 (222)−336 (−948 to 140)−245 (−773 to 243)
 Medication8 (2)38 (23)−30 (−93 to −11)−11 (−26 to 0)
Indirect costs
 Informal care172 (43)334 (63)−162 (−306 to −28)−152 (−283 to −18)
 Absenteeism4774 (389)5820 (361)−1047 (−2050 to −14)−924 (−1808 to −37)
 Presenteeism3183 (396)3738 (435)−555 (−1629 to 503)−1007 (−1757 to −313)
 Unpaid productivity loss1097 (220)1629 (180)−532 (−1019 to 65)−518 (−1011 to 61)
Total healthcare costs5865 (215)6112 (248)248 (−901 to 316)138 (−711 to 415)
Total societal costs15 090 (719)17 633 (700)2543 (−4380 to −686)2787 (−4401 to −1181)
  • Please note that the difference in total societal costs of this table slightly differs from that of table 3. This is given by the fact that in the current table, linear regression was used for estimating cost differences, whereas for table 3 a system of Seemingly Unrelated Regressions was used.

  • Total values are depicted in bold font.

  • PTED, percutaneous transforaminal endoscopic discectomy; SEM, standard error of the mean.