Risk factors for incident delirium among urological patients: a systematic review and meta-analysis with GRADE summary of findings

Table 3 Meta-analyses of risk factors for post-operative delirium

Risk factor	Studies/total sample (n/n)	Statistical method	Pooled OR/MD** [95% CI]	Heterogeneity I² (%)
1. Age*	3/663	IV, Random	4.314 [1.597, 7.032]**	73
2. Male Sex	5/1094	M–H, Random	1.284 [0.421, 3.910]	40
3. BMI	4/1107	IV, Random	0.372 [− 0.121, 0.865]**	0
4. ADL score	3/892	IV, Random	0.061 [− 0.776, 0.898]**	98
5. Pre-op MMSE Score	4/982	IV, Random	− 0.476 [− 1.570, 0.618]**	96
6. Education	2/448	IV, Random	− 0.878 [− 1.758, 0.002]**	80
7. CDT mean*	2/575	IV, Random	− 2.443 [− 3.029, − 1.857]**	90
8. Regional anaesthesia	4/763	M–H, Random	0.826, [0.445, 1.533]	0
9. ≥ 2 Co morbidities	2/448	M–H, Random	1.959 [0.984, 3.903]	0

M−H Mantel–Haenszel, IV inverse variance, OR odds ratio, MD mean difference, BMI body mass index, ADL activities of daily living, MMSE mini mental state examination, CDT clock drawing test
*p-value < 0.05. See Additional file 1: figure 1 for corresponding forest plots.

ISSN: 1471-2490