modified_bishop_score: Modified Bishop Score for Vaginal Delivery

In cliot: Clinical Indices and Outcomes Tools

Modified Bishop Score for Vaginal Delivery

Description

Calculates the Modified Bishop Score to assess the readiness of the cervix for induction of labor. The score evaluates five parameters: Dilation, Effacement, Station, Consistency, and Position. A higher score indicates a more favorable cervix for successful vaginal delivery.

Usage

modified_bishop_score(dilation_cm, effacement_percent, station,
                      consistency, position)

Arguments

dilation_cm	Numeric. Cervical dilation in centimeters. 0 cm: 0 pts. 1-2 cm: 1 pt. 3-4 cm: 2 pts. >= 5 cm: 3 pts.
effacement_percent	Numeric. Cervical effacement percentage. 0-30%: 0 pts. 40-50%: 1 pt. 60-70%: 2 pts. >= 80%: 3 pts.
station	Numeric. Fetal station relative to ischial spines (-3 to +2). -3: 0 pts. -2: 1 pt. -1, 0: 2 pts. +1, +2: 3 pts.
consistency	String. Consistency of the cervix. Options: "firm" (0 pts), "medium" (1 pt), "soft" (2 pts).
position	String. Position of the cervix. Options: "posterior" (0 pts), "midposition" (1 pt), "anterior" (2 pts).

Value

A list containing:

Bishop_Score	The calculated total score (Range 0-13).
Interpretation	Clinical assessment (Favorable > 8, Unfavorable < 6).

References

Laughon SK, Zhang J, Troendle J, Sun L, Reddy UM. Using a simplified Bishop score to predict vaginal delivery. Obstet Gynecol. 2011;117(4):805-811. doi:10.1097/AOG.0b013e3182114ad2

Examples

# Example 1: Favorable Cervix
# 4cm dilated (2), 60% effaced (2), -1 station (2), Soft (2), Anterior (2)
# Score = 10
modified_bishop_score(4, 60, -1, "soft", "anterior")

# Example 2: Unfavorable Cervix
# Closed (0), 30% effaced (0), -3 station (0), Firm (0), Posterior (0)
# Score = 0
modified_bishop_score(0, 30, -3, "firm", "posterior")

cliot documentation built on Dec. 1, 2025, 1:06 a.m.