Table 2. Multivariate analysis of pre-operative risk factors for complications following O-CTR.

PHQ-2: Patient Health Questionnaire-2; CTS-6: Carpal Tunnel Syndrome-6 test; NCS: Nerve conduction studies; EMG: Electromyography; O-CTR: Open carpal tunnel release

Variable	Odds ratio	95% confidence interval	p-value
Age (years)	1.04	0.95-1.14	0.36
Symptom duration (months)	0.99	0.96-1.02	0.38
Body mass index	0.92	0.81-1.04	0.16
Tobacco use	1.06	0.23-4.94	0.95
Sex	0.98	0.16-6.04	0.98
PHQ-2 score	1.39	1.07-1.99	0.04
CTS-6 score	1.08	0.91-1.29	0.38
Charlson Comorbidity Index	1.10	0.64-1.92	0.73
Patient-reported allergies	1.80	1.18-2.75	<0.01
NCS - sensory latency	1.04	0.49-2.17	0.93
NCS - motor latency	1.15	0.49-2.72	0.75
NCS - conduction velocity	1.05	0.96-1.15	0.26
EMG (end-organ abnormality)	4.11	0.76-22.26	0.10