Relative Prevalence and Associated Factors of Complex Regional Pain Syndrome Type I in Patients with Radial Head Fractures Treated with Open Reduction and Internal Fixation: A Cross-Sectional Study

Table 3

Demographic characteristics of study sample.

Characteristics	Patients with CRPS I (n = 28)	Patients without CRPS I (n = 495)	value
Age (year)	41.0 ± 7.6	49.2 ± 8.2	<0.01
Gender, n
Male	10	88
Female	18	407	0.018
Dominant hand, n
Left	4	92
Right	24	403	0.567
Injured side
Dominant	24	421
Nondominant	4	74	0.923
Body mass index (kg/m^2)	22.6 ± 3.0	22.0 ± 2.7	0.263
The time from fracture to surgery	5.7 ± 1.2	5.3 ± 1.7	0.081
Marital status, n
Married	20	284
Divorced	4	40
Single	1	109
Widowed	3	62	0.091
Education, n
University degrees	19	290
Primary and secondary school degrees	8	161
Illiterate	1	44	0.108
Job status, n
Unemployed	5	143
Employed	23	352	0.207
Socioeconomic status, n
High	8	142
Medium	17	240
Low	3	113	0.278
Type of trauma
High energy	20	322
Medium energy	5	63
Low energy	3	110	0.322
Tobacco use, n (%)	9	137	0.608
Alcohol use, n (%)	11	178	0.722
Medical problems
Hypertension, n	13	231	0.980
Diabetes mellitus, n	12	151	0.170
Renal disease, n	3	34	0.438