This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

pARC – Pediatric Appendicitis Risk Calculator

Probability of appendicitis (5–18 years) from sex, age, duration of pain, findings and neutrophil count (Kharbanda 2018)

Child

Sex

male female

Age

History and findings

Duration of pain

Pain when walking, coughing or hopping

Migration of pain to the right lower abdomen

Maximal tenderness in the right lower abdomen

Guarding

Laboratory (at least one value, otherwise cohort mean)

Absolute neutrophil count (ANC) (G/l)

Leukocytes (if no ANC available) (G/l)

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

Found an error or have an idea?

Tell us if something does not work or could be better.

Give feedback

Sources

Development and Validation of a Novel Pediatric Appendicitis Risk Calculator (pARC) (Pediatrics 141:e20172699) Kharbanda AB, Vazquez-Benitez G, Ballard DW, et al., 2018. Original paper (free; Table 3 read)

Scientific basis last reviewed: September 2026.

Related calculators

Note

Calculation aid for healthcare professionals. Percentiles and z-scores describe the position of a measured value in the reference population; clinical assessment remains with the treating physician.