VAS of different treatments.

For VAS, standard mean differences (SMDs) lower than 0 favour the column-defining treatment. Direct comparsions were shown in the upper right. Indirect comparsions were shown in the bottom left. The number which was painted by a style of overstriking indicated there was a significant difference between two treatments. PVP: Percutaneous vertebroplasty; BK: Balloon kyphoplasty; CT: Conservative treatment.VAS of different treatments.