TABLE 1

Overall Patient Demographics and Characteristics

OverallPreimplementation PeriodImplementation PeriodP
Number enrolled28037672036
Patients with appendicitis, n (%)794 (28)208 (27)586 (29)0.38
 Female, n (%)1508 (53.8)422 (55)1086 (53.3)0.43
Race/ethnicity0.74
 Asian, n (%)173 (6.2)42 (5.5)131 (6.4)
 Black/African American, n (%)307 (11)86 (11.2)221 (10.9)
 Hispanic/Latino, n (%)353 (12.6)89 (11.6)264 (13)
 White, n (%)1640 (58.5)464 (60.5)1176 (57.8)
 Unknown, n (%)151 (5.4)39 (5.1)112 (5.5)
Age groups, y0.09
 <5, n (%)225 (8)67 (8.7)158 (7.8)
 5–11, n (%)1425 (50.8)363 (47.5)1061 (52.1)
  ≥12, n (%)1153 (41.1)336 (43.8)817 (40.1)
 Age, mean (SD), y10.8 (4.0)10.9 (4.1)10.8 (3.9)0.41
Clinical findings
 Temperature, median (IQR), (C°)37 (36.8–37.5)37 (36.7–37.6)37 (36.8–37.5)0.09
 Anorexia, n (%)630 (30)168 (29)362 (31)0.28
 Nausea, n (%)1038 (56)288 (53)750 (58)0.05
 Emesis, n (%)1257 (48)314 (44)943 (49)0.04
 Presence of RLQ pain, n (%)1745 (66)493 (68)1252 (65)0.12
 Migration of pain to RLQ, n (%)713 (27)241 (33)472 (24)<0.001
Laboratory values median (IQR)
 WBC (× 103/μl)9.6 (7.0–13.9)10.0 (7.3–14.2)9.5 (7.0–13.8)0.04
 ANC (× 103/μl)6.6 (4.0–11.1)6.9 (4.1–11.6)6.5 (4–11.1)0.13
 Neutrophil (%)71 (57–82)72 (57–82)70 (57–82)0.44
 CRP (mg/dL)0.6 (0.2–2.6)0.6 (0.2–2.6)0.6 (0.2–2.6)0.39
  • Forty-nine subjects were excluded from the calendar week when the CDS tool was initiated. ANC, Absolute Neutrophil Count; IQR, interquartile range.