qids_depression_score: Quick Inventory of Depressive Symptomatology (QIDS-SR16)

Description

Calculates the QIDS total score based on 16 items that assess the severity of depressive symptoms. The scoring logic groups the 16 items into 9 clinical domains (matching DSM criteria), taking the highest score within a specific domain (e.g., Sleep, Appetite/Weight, Psychomotor) as the score for that domain.

Usage

qids_depression_score(sleep_onset, sleep_mid_nocturnal, sleep_early_waking,
                      sleep_hypersomnia, mood_sadness, appetite_decreased,
                      appetite_increased, weight_decreased, weight_increased,
                      concentration, view_of_self, thoughts_death_suicide,
                      general_interest, energy_level, psychomotor_slowing,
                      psychomotor_agitation)

Value

A list containing:

QIDS_Total_Score: The sum of the 9 domain scores (Range 0-27).
Severity_Category: Interpretation (None, Mild, Moderate, Severe, Very Severe).
Domain_Scores: The specific scores calculated for the 9 domains.

Arguments

sleep_onset: Numeric (0-3). Q1: Falling asleep.
sleep_mid_nocturnal: Numeric (0-3). Q2: Sleep during the night.
sleep_early_waking: Numeric (0-3). Q3: Waking up too early.
sleep_hypersomnia: Numeric (0-3). Q4: Sleeping too much.
mood_sadness: Numeric (0-3). Q5: Feeling sad.
appetite_decreased: Numeric (0-3). Q6: Decreased appetite.
appetite_increased: Numeric (0-3). Q7: Increased appetite.
weight_decreased: Numeric (0-3). Q8: Decreased weight (within last 2 weeks).
weight_increased: Numeric (0-3). Q9: Increased weight (within last 2 weeks).
concentration: Numeric (0-3). Q10: Concentration / Decision making.
view_of_self: Numeric (0-3). Q11: View of myself.
thoughts_death_suicide: Numeric (0-3). Q12: Thoughts of death or suicide.
general_interest: Numeric (0-3). Q13: General interest.
energy_level: Numeric (0-3). Q14: Energy level.
psychomotor_slowing: Numeric (0-3). Q15: Feeling slowed down.
psychomotor_agitation: Numeric (0-3). Q16: Feeling restless.

References

Rush AJ, Trivedi MH, Ibrahim HM, et al. The 16-Item Quick Inventory of Depressive Symptomatology (QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric evaluation in patients with chronic major depression. Biol Psychiatry. 2003;54(5):573-583. doi:10.1016/s0006-3223(02)01866-8

Examples

Run this code


# Example 1: Severe Depression
# High scores in sleep (max 3), sadness (3), energy (3), suicide (1)
qids_depression_score(3, 2, 1, 0, 3, 0, 0, 0, 0, 2, 2, 1, 2, 3, 1, 0)

# Example 2: Normal
# All items 0
qids_depression_score(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)

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