Data extraction variables
| Content | Data items |
|---|---|
| Prospective study information | Author(s) Year of publication |
| Surgical procedure | Description of surgical procedure, for example, discectomy, microdiscectomy |
| Mean duration of symptoms | Mean and SD in months for duration of symptoms prior to surgery |
| Number of participants | N=? |
| Setting | Nature of clinical setting Country |
| Intervention during follow-up phase | Reported surgical, pharmacological or conservative management during follow-up phase |
| Pain outcome measure | Detail of pain outcome measure |
| Disability outcome measure | Detail of disability outcome measure |
| Baseline | Detail of preoperative timing of baseline assessment |
| Follow-up assessment points | Detail of timing of postoperative timing of follow-up assessments |
| Losses to follow-up | Detail of losses to follow-up at postoperative assessment points |
| Results | Mean and SD of outcomes at baseline and follow-up assessment points |