cliot (version 1.0.0)

stone_ureteral_score: STONE Score for Uncomplicated Ureteral Stone

Description

Calculates the STONE Score to predict the likelihood of an uncomplicated ureteral stone in patients presenting with flank pain. This score can help reduce radiation exposure by identifying patients with a high probability of ureteral stones who may not require immediate CT imaging.

Usage

stone_ureteral_score(sex, duration_of_pain_hours, race, nausea_vomiting,
                     hematuria_on_dipstick)

Value

A list containing:

STONE_Score

The calculated total score (Range 0-13).

Risk_Category

Classification (Low, Moderate, High).

Ureteral_Stone_Probability

Estimated probability of ureteral stone presence.

Arguments

sex

String. Patient sex ("Male" or "Female"). (Male adds 2 points).

duration_of_pain_hours

Numeric. Duration of pain prior to presentation in hours. <6 hours: +3 pts. 6-24 hours: +1 pt. >24 hours: 0 pts.

race

String. Patient race ("Black" or "Non_Black"). (Non-Black adds 3 points).

nausea_vomiting

Numeric (0, 1, or -1 if specified "none" but usually N/V is present vs absent). Here: Nausea alone = 1 pt, Vomiting = 2 pts, None = 0 pts. (Note: MDCalc implementation often simplifies to Nausea/Vomiting vs None, but original derivation uses graded points: Nausea +1, Vomiting +2). Wait, re-checking standard scoring: Nausea alone: 1 pt. Vomiting: 2 pts. None: 0 pts. Let's assume input 0=None, 1=Nausea, 2=Vomiting.

hematuria_on_dipstick

Numeric (0 or 1). Presence of hematuria on urine dipstick. (1 = Yes, +3 points).

References

Moore CL, Bomann S, Daniels B, et al. Derivation and validation of a clinical prediction rule for uncomplicated ureteral stone—the STONE score: retrospective and prospective validation. BMJ. 2014;348:g2191. doi:10.1136/bmj.g2191

Examples

# Example 1: High Probability
# Male (+2), Pain <6h (+3), Non-Black (+3), Vomiting (+2), Hematuria (+3)
# Score = 13
stone_ureteral_score("male", 4, "non_black", 2, 1)

# Example 2: Low Probability
# Female (0), Pain >24h (0), Black (0), No N/V (0), No Hematuria (0)
# Score = 0
stone_ureteral_score("female", 30, "black", 0, 0)