- Select the appropriate instrument using the tabs. Start with NIDA Single-Item as a universal drug screen or AUDIT-C as a universal alcohol screen. Administer the full DAST-10 for any positive NIDA result or if drug use is clinically suspected.
- For AUDIT-C, specify the patient's sex (male/female) before scoring — the positive cutoff differs: ≥4 for men, ≥3 for women. Ask about the past 12 months. One standard drink ≈ 1 bottle of beer (330 mL, 5%), 1 glass of wine (150 mL, 12%), or 1 shot of spirits (40 mL, 40%).
- For DAST-10, instruct the patient to exclude alcohol and to include prescription medications used for non-medical reasons. Item 3 ("Are you always able to stop…") is reverse-scored — a "No" answer scores 1 point.
- For CAGE-AID, explicitly ask the patient to consider both alcohol and other drug use together when answering. This is the adapted version (AID = Adapted to Include Drugs).
- Review the result box for the running score and interpretation band. The band only appears after all items in the selected tool are answered.
- Act on the result: a negative screen warrants reinforcement and periodic rescreening; a positive screen warrants a structured brief intervention (motivational interviewing, 5–10 min); a high or severe score warrants warm referral to addiction medicine or a social worker with expertise in substance use disorders.
- Document using person-first language: "patient reports hazardous alcohol use (AUDIT-C 5/12)" — not "patient is an alcoholic." Avoid stigmatizing terms in the medical record.
When to Use
Use these tools whenever a patient with CKD, ESKD, or kidney transplant presents for clinic review, hospitalization, or dialysis initiation, and a structured substance-use history is warranted. Substance use is common and frequently under-detected in nephrology patients — alcohol alone accounts for 20–30% of cases of AKI referred to nephrology, and NSAID and opioid misuse are leading preventable nephrotoxic exposures in the Filipino ambulatory setting.
Appropriate population
Adults with CKD G1–G5, maintenance hemodialysis or peritoneal dialysis, or post-kidney transplant who can self-report or answer clinician-administered questions. Use as the first step of a three-step SBIRT protocol: (1) universal brief screen → (2) full instrument for positives → (3) brief intervention + referral if disorder is likely. The NIDA single-item or AUDIT-C single alcohol-quantity question serves as the universal first step; the full instruments on this page serve as step 2.
When NOT to rely solely on these scores
Screening scores are not diagnostic. A positive screen indicates probable hazardous use or possible disorder — it does not establish a DSM-5-TR substance use disorder (SUD) diagnosis, which requires a full clinical interview. Do not withhold analgesia, opioid agonist therapy, or transplant referral based on a screening score alone. Scores should inform, not replace, individualized clinical judgment. Cognitive impairment (common in advanced CKD) can affect self-report reliability — validate with collateral history when possible.
Pearls & Pitfalls
Use the teachable moment
The acute kidney event — AKI hospitalization, dialysis initiation, or transplant evaluation — is the highest-leverage point for behavior change. Patients are often frightened and receptive. A brief motivational intervention delivered in that context has measurably higher efficacy than the same intervention at a routine outpatient visit. Do not miss it.
Combine tools appropriately
AUDIT-C and NIDA single-item screen together take less than 90 seconds and cover the full spectrum of alcohol and drug use — making them the ideal universal screen for every nephrology encounter. The longer instruments (DAST-10, CAGE-AID) add specificity for patients who screen positive on the brief tools. Do not administer all four instruments to every patient — that creates instrument fatigue and stigma.
CKD-specific considerations
Standard AUDIT and DAST cutoffs were validated in general adult populations. Patients with advanced CKD or ESKD may have alcohol or drug metabolite accumulation altering clinical presentation. eGFR-adjusted AUDIT cutoffs have not been formally established. Clinical judgment should be applied when the score is borderline and the clinical picture is ambiguous. Opioid use disorder in dialysis patients requires addiction-medicine co-management because of altered opioid clearance and risk of accumulation of active metabolites (e.g., morphine-6-glucuronide in patients on HD).
Pitfalls to avoid
(1) Do not use the score to deny care — a high DAST-10 or AUDIT-C is an indication to treat more comprehensively, not less. Denying dialysis or transplant referral based on a screening score alone is not standard of care. (2) Avoid stigmatizing documentation — "substance use disorder" and "alcohol use disorder" are correct DSM-5 diagnostic terms; "addict," "abuser," and "drug-seeking" are not and may harm the therapeutic alliance and future care. (3) Do not rely on toxicology screening alone — urine drug screens detect recent use but not severity, frequency, or functional impairment; SBIRT captures the clinical picture that tox screens miss.
Why Use It
Undetected substance use accelerates CKD progression through several mechanisms: alcohol-associated hypertension, IgA nephropathy, and hepatorenal syndrome; opioid-induced hypoxic-ischemic AKI and rhabdomyolysis; NSAID-induced hemodynamic and interstitial nephropathy; and amphetamine or cocaine-driven malignant hypertension and TMA. Structured SBIRT outperforms opportunistic questioning: brief validated screens increase detection rates by 40–60% compared to unstructured inquiry and require only 1–3 minutes at the point of care.
For nephrology specifically, detecting substance use changes clinical management: phosphate binders and calcineurin inhibitors interact with alcohol-related hepatic metabolism; transplant candidacy assessment requires documented SUD evaluation; and motivational interventions around the "teachable moment" of an AKI event or dialysis initiation have the highest probability of behavior change.
SBIRT Screening Suite — AUDIT-C · DAST-10 · CAGE-AID · NIDA Single-Item
Tap an answer for each item; the score and interpretation update automatically. Switch between instruments using the tabs below. All scoring runs locally in your browser — nothing is saved or transmitted.
Cutoffs per published validation studies (AUDIT-C: Bush 1998; DAST-10: Skinner 1982; CAGE-AID: Brown & Rounds 1995; NIDA Quick Screen / NM-ASSIST). Sensitivity and specificity vary by population; confirm every positive screen with full clinical assessment.
Next Steps
Use the result to support — not replace — clinical judgment.
- Interpret the value against the targets shown in the calculator and the Evidence section below, in the context of the full clinical picture.
- Trend serial measurements rather than acting on a single result; confirm abnormal or unexpected values before changing management.
- Apply the relevant KDIGO / specialty-guideline threshold and document the indication.
- Escalate or refer to nephrology when results are out of range, rapidly changing, or discordant with the clinical picture — and discuss the implications with the patient.
Evidence & References
Formula & Equations
AUDIT-C (Alcohol Use Disorders Identification Test — Consumption)
Three items, each scored 0–4. Maximum score: 12. Higher = more hazardous use.
| Item | Response options (score) |
|---|---|
| 1. How often do you have a drink containing alcohol? | Never (0) · Monthly or less (1) · 2–4×/month (2) · 2–3×/week (3) · 4+×/week (4) |
| 2. How many drinks on a typical drinking day? | 1–2 (0) · 3–4 (1) · 5–6 (2) · 7–9 (3) · 10+ (4) |
| 3. How often do you have ≥6 drinks on one occasion? | Never (0) · <Monthly (1) · Monthly (2) · Weekly (3) · Daily/almost daily (4) |
| Score | Men | Women | Action |
|---|---|---|---|
| 0–3 (men) / 0–2 (women) | Negative | Negative | Reinforce low-risk limits; rescreen annually |
| 4–7 (men) / 3–7 (women) | Positive — hazardous use | Positive — hazardous use | Brief motivational intervention; assess for AUD; review CKD interactions |
| 8–12 | Positive — likely AUD | Positive — likely AUD | Brief intervention + referral; assess withdrawal risk; evaluate hepatorenal and CV impact |
DAST-10 (Drug Abuse Screening Test)
Ten yes/no items; item 3 is reverse-scored. Maximum score: 10. Higher = greater severity. Refers to past 12 months, all substances except alcohol.
| Score | Severity | Action |
|---|---|---|
| 0 | No problems reported | No intervention needed; rescreen if suspicion persists |
| 1–2 | Low level | Brief advice and monitoring; re-assess at follow-up |
| 3–5 | Moderate | Brief intervention; consider referral for full SUD assessment |
| 6–8 | Substantial | Intensive assessment; refer to addiction medicine; screen for nephrotoxic exposures |
| 9–10 | Severe | Intensive assessment + referral strongly indicated; addiction-medicine co-management with nephrology |
CAGE-AID (CAGE Adapted to Include Drugs)
Four yes/no items (C-A-G-E mnemonic), considering alcohol and drugs together. Each "Yes" = 1 point. Maximum: 4.
| Item | Mnemonic |
|---|---|
| 1. Have you ever felt you ought to Cut down on your drinking or drug use? | Cut down |
| 2. Have people Annoyed you by criticizing your drinking or drug use? | Annoyed |
| 3. Have you ever felt bad or Guilty about your drinking or drug use? | Guilty |
| 4. Have you ever had a drink or used drugs first thing in the morning (Eye-opener)? | Eye-opener |
| Score | Interpretation | Action |
|---|---|---|
| 0 | Negative screen | Rescreen if clinical suspicion persists |
| 1 | Possible — explore further | Administer AUDIT-C and/or DAST-10 for fuller picture |
| 2–4 | Positive screen | Brief intervention + full SUD assessment indicated |
NIDA Single-Item Drug Screen
"How many times in the past year have you used an illegal drug or used a prescription medication for non-medical reasons?" Any answer ≥ 1 is a positive screen and should be followed by the full NM-ASSIST for substance-specific involvement scoring.
| Answer | Result | Action |
|---|---|---|
| 0 times | Negative screen | No intervention needed beyond reinforcement |
| 1 or more times | Positive screen | Proceed to full NM-ASSIST; document substance(s), route, frequency, last use |
Evidence & References
The instruments in this screening suite each have extensive validation literature. Below are the primary validation sources and selected CKD-relevant studies.
- Bush K, Kivlahan DR, McDonell MB, Fihn SD, Bradley KA. The AUDIT alcohol consumption questions (AUDIT-C): an effective brief screening test for problem drinking. Arch Intern Med. 1998;158(16):1789–1795.
- Skinner HA. The Drug Abuse Screening Test. Addict Behav. 1982;7(4):363–371.
- Brown RL, Rounds LA. Conjoint screening questionnaires for alcohol and other drug abuse: criterion validity in a primary care practice. Wis Med J. 1995;94(3):135–140. [CAGE-AID validation]
- Smith PC, Schmidt SM, Allensworth-Davies D, Saitz R. A single-question screening test for drug use in primary care. Arch Intern Med. 2010;170(13):1155–1160. [NIDA single-item validation against AUDIT and DAST]
- Saitz R. Unhealthy alcohol use. N Engl J Med. 2005;352(6):596–607. [Review: brief intervention evidence and SBIRT framework]
- Saunders JB, Aasland OG, Babor TF, de la Fuente JR, Grant M. Development of the Alcohol Use Disorders Identification Test (AUDIT): WHO Collaborative Project on Early Detection of Persons with Harmful Alcohol Consumption-II. Addiction. 1993;88(6):791–804.
- Lash SJ, Stephens RS, Burden JL, et al. Contracting, prompting, and reinforcing substance use disorder continuing care: a randomized clinical trial. Psychol Addict Behav. 2007;21(3):387–397.
- Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney Int. 2024;105(4S):S117–S314. [Includes guidance on lifestyle, substance use, and nephrotoxin avoidance in CKD]
