cliot (version 1.0.0)

major_depression_index: Major Depression Index (MDI)

Description

Calculates the Major Depression Index (MDI) score, a self-rating scale used to measure the severity of depressive symptoms. It evaluates 10 items (with sub-items for psychomotor and appetite changes) on a 0-5 scale based on frequency over the last 2 weeks. The scoring logic takes the maximum value for items 8 (restlessness vs. slowed down) and 10 (reduced vs. increased appetite).

Usage

major_depression_index(low_spirits, loss_of_interest, lacking_energy,
                       self_confidence, guilt, suicidal_ideation, concentration,
                       restlessness, slowed_down, sleep_trouble, reduced_appetite,
                       increased_appetite)

Value

A list containing:

MDI_Score

The calculated total score (Range 0-50).

Severity_Category

Interpretation (None <20, Mild 20-24, Moderate 25-29, Severe >=30).

Arguments

low_spirits

Numeric (0-5). Frequency of feeling low in spirits or sad.

loss_of_interest

Numeric (0-5). Frequency of losing interest in daily activities.

lacking_energy

Numeric (0-5). Frequency of lacking energy/strength.

self_confidence

Numeric (0-5). Frequency of feeling less self-confident.

guilt

Numeric (0-5). Frequency of having a bad conscience or feelings of guilt.

suicidal_ideation

Numeric (0-5). Frequency of feeling that life isn't worth living.

concentration

Numeric (0-5). Frequency of trouble concentrating.

restlessness

Numeric (0-5). Frequency of feeling very restless (8a).

slowed_down

Numeric (0-5). Frequency of feeling subdued or slowed down (8b).

sleep_trouble

Numeric (0-5). Frequency of trouble sleeping at night.

reduced_appetite

Numeric (0-5). Frequency of reduced appetite (10a).

increased_appetite

Numeric (0-5). Frequency of increased appetite (10b).

Details

Scoring Key (Frequency over last 2 weeks): 0 = At no time 1 = Some of the time 2 = Slightly less than half the time 3 = Slightly more than half the time 4 = Most of the time 5 = All the time

References

Bech P, Rasmussen NA, Olsen LR, Noerholm V, Abildgaard W. The sensitivity and specificity of the Major Depression Inventory, using the Present State Examination as the index of validity. J Affect Disord. 2001;66(2-3):159-164. doi:10.1016/s0165-0327(00)00309-8

Examples

# Example 1: Severe Depression
# All items scored 4 or 5
major_depression_index(5, 5, 4, 4, 5, 2, 4, 5, 0, 4, 0, 5)

# Example 2: Mild Depression
# Scores around 2 or 3
major_depression_index(2, 3, 2, 2, 1, 0, 2, 2, 0, 3, 3, 0)