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Table 1 Characteristics of the three retrospective cohort studies

From: Analysis of percutaneous kyphoplasty or short-segmental fixation combined with vertebroplasty in the treatment of Kummell disease

Author, year, location Study design Number of patients Operative time (min) bleeding volume (ml) VAS score ODI score Local vertebral Cobb angle Cement leakage
PKP SSF + VP PKP SSF + VP PKP SSF + VP PKP SSF + VP PKP SSF + VP PKP SSF + VP PKP SSF + VP
Liang Chen, 2015, China Retrospective cohort 31 23 76 (60–95) 128 (95–165) Minimal 245 Pre7.8 ± 0.9
POM 3.3 ± 1.0
Fin 2.9 ± 0.9
Pre7.2 ± 1.6 POM 4.7 ± 1.3 Fin 3.5 ± 1.2 ND ND Pre 22.7 ± 6.9
POM 14.5 ± 5.3 Fin 15.5 ± 5.2
Pre 24.7 ± 9.2
POM 15.5 ± 6.2
Fin 15.8 ± 5.6
11 5
Yan-Sheng Huang, 2018, China Retrospective cohort 32 28 43.1 ± 7.1 115.9 ± 10.0 9.9 ± 2.7 214.3 ± 17.5 Pre 8.1 ± 0.8
POM 2.8 ± 0.8 Fin 2.9 ± 1.2
Pre 8.0 ± 0.9
POM 3.8 ± 0.7 Fin 2.7 ± 1.3
Pre 75.3 ± 5.0
Fin 34.4 ± 5.0
Pre 74.4 ± 5.1
Fin 33.1 ± 4.4
Pre 22.9 ± 3.9
POM 14.5 ± 3.8
Fin 15.1 ± 4.6
Pre 22.6 ± 5.9
POM 13.6 ± 3.9
Fin 14.0 ± 4.4
3 3
Hou-Kun Li, 2017, China Retrospective cohort 25 21 43.2 ± 21.8 230.6 ± 87.1 5.3 ± 3.1 215.0 ± 170.2 Pre 8.1 ± 0.8;
POM 2.8 ± 0.8 Fin 2.9 ± 1.2
Pre 7.0 ± 1.4 POM 1.6 ± 0.9 Fin 1.2 ± 0.9 Pre 72.5 ± 10.0
Fin 27.2 ± 9.0
Pre 77.5 ± 10.6
Fin 26.0 ± 6.3
Pre 22.8 ± 7.4
POM 14.9 ± 8.2
Fin 17.0 ± 7.2
Pre 21.7 ± 3.6
POM 15.0 ± 6.7
Fin 16.5 ± 2.8
2 1
  1. Abbreviations: PKP percutaneous kyphoplasty, SSF short-segmental fixation, VP vertebroplasty, VAS visual analog scale, ODI Oswestry Disability Index, Pre preoperative, POM postoperative 1 month, Fin final follow-up, ND no data