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Table 4 Describe characteristics of patients from derivation and external validation data

From: Developing and validating of Ramathibodi Appendicitis Score (RAMA-AS) for diagnosis of appendicitis in suspected appendicitis patients

Characteristics RA (n = 396) TS (n = 152) CP (n = 178)
Mean age (SD), years 36.3(14.6) 35.6(16 .9) 42.9(16.8)
Men 132 (35.8%) 40 (26.4%) 71 (39.9%)
Symptoms
 Progression of pain 336 (84.8%) 98 (64.5%) 147 (82.6%)
 Aggravation of pain 287 (72.5%) 78 (51.4%) 104 (58.4%)
 Migration of pain 177 (44.7%) 73 (48.0%) 125 (70.2%)
Signs
 Body temperature ≥ 37.8 °C 74 (18.7%) 30 (19.7%) 67 (37.6%)
 Rebound tenderness 192 (48.5%) 65 (42.8%) 127 (71.3%)
Laboratory
 WBC 315 (79.6%) 125 (82.2%) 141 (79.2%)
 Neutrophil 262 (66.2%) 115 (75.7%) 124 (69.7%)
 Prevalence of appendicitis 245/396 (61.8%) 74/152 (48.7%) 137/178 (76.9%)
  1. CP Chaiyaphum Hospital, RA Ramathibodi Hospital, TS Thammasat University Hospital