Table 4 Subgroup analysis of delirium after spine surgery
From: Prevalence and risk factors of postoperative delirium after spinal surgery: a meta-analysis
Outcomes | Number of trials | Pooled prevalence with 95%CI | I2 (%) |
|---|---|---|---|
Primary analysis | 28 | 0.009 (0.008–0.009) | 97.3 |
Subgroup analyses based on the region | |||
Asia | 17 | 0.077 (0.069–0.084) | 91.3 |
Europe | 2 | 0.053 (0.024–0.082) | 94.1 |
North America | 9 | 0.008 (0.008–0.009) | 98.3 |
Subgroup analyses based on the year of survey | |||
Before 2010 | 5 | 0.041 (0.030–0.052) | 82.8 |
After 2010 | 23 | 0.009 (0.008–0.009) | 97.7 |
Subgroup analyses based on the sample size | |||
> 500 | 7 | 0.008 (0.008–0.009) | 98.8 |
≤ 500 | 21 | 0.088 (0.079–0.097) | 90.9 |
Subgroup analyses based on the type of operation | |||
Oncological spine surgery | 2 | 0.053 (0.024, 0.082) | 94.1 |
Non-oncological spine surgery | 26 | 0.009 (0.008–0.009) | 97.4 |
Subgroup analyses based on the mean age of candidate patients | |||
> 60 | 22 | 0.082(0.077–0.088) | 92.3 |
≤ 60 | 6 | 0.009(0.008–0.009) | 93.2 |
Subgroup analyses based on the study design | |||
Database analysis | 4 | 0.008(0.008–0.009) | 98 |
Non-database related observational study | 24 | 0.084(0.078–0.09) | 92.4 |
Subgroup analyses based on the preoperative disease status | |||
Patients with not preoperative cerebrovascular disorders | 28 | 0.008(0.008–0.009) | 97.2 |
Patients with preoperative cerebrovascular disorders | 3 | 0.087(0.079–0.093) | 97.4 |