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Table 3 Comparison of demographics and pain characteristics between the two complex regional pain syndrome (CRPS) groups according to pain duration

From: Impact of adolescent complex regional pain syndrome on the psychopathology of young men ahead of military service: a retrospective cohort analysis of Korean conscription data

Variable Pain duration < 15 mon group (n = 30) Pain duration≥15 mon group (n = 33) P
Age [year, median (range)] 19.3 (19.0–20.0) 19.3 (19.0–20.0) 0.086
Male [n (%)] 30 (100.0) 33 (100.0)  
Education [n (%)]
 College or more 20 (66.7) 20 (60.6) 0.617
 High school or less 10 (33.3) 13 (39.4)  
Socioeconomic status [n (%)]
 High 5 (16.7) 3 (9.1) 0.385
 Middle 17 (56.7) 16 (48.5)  
 Low 8 (26.7) 14 (42.4)  
Parental coresidence status [n (%)]
 Both 27 (90.0) 27 (81.8) 0.710
 One parent 3 (10.0) 5 (15.2)  
 None 0 (0.0) 1 (3.0)  
mCSS (2–9) 4.53 ± 1.72 3.61 ± 1.32 0.019
NRS (0–10) 6.40 ± 1.65 6.12 ± 1.49 0.485
CRPS type [n (%)]
 I 23 (76.7) 26 (78.8) 0.841
 II 7 (23.3) 7 (21.2)  
Affected site [n (%)]
 Upper extremity 10 (33.3) 8 (24.2) 0.209
 Lower extremity 18 (60.0) 25 (75.8)  
 Multiple 2 (6.7) 0 (0.0)  
Symptomatic presentation [n (%)]
 Allodynia 22 (73.3) 24 (72.7) 1
 Hyperalgesia 22 (73.3) 21 (63.6) 0.410
 Temperature asymmetry 17 (56.7) 17 (51.5) 0.680
 Skin color asymmetry 21 (70.0) 16 (48.5) 0.083
 Sweating asymmetry 17 (56.7) 11 (33.3) 0.062
 Asymmetric edema 14 (46.7) 12 (36.4) 0.406
 Trophic changes 8 (26.7) 4 (12.1) 0.142
 Motor dysfunction 9 (30.0) 12 (36.4) 0.590
 Decreased active range of motion 6 (20.0) 2 (6.1) 0.136
Treatment [n (%)]
 Physical or pharmacological therapy 8 (26.7) 13 (39.4) 0.540
 Sympathetic nerve intervention 18 (60.0) 15 (45.5)  
 Spinal cord stimulation 4 (13.3) 5 (15.2)  
  1. mCSS Modified Complex regional pain syndrome Severity Score, NRS Numerical rating scale, CRPS Complex regional pain syndrome