Correct Answer: C. SBP, RR, GCS score
The qSOFA (quick Sequential Organ Failure Assessment) score is a bedside tool designed to rapidly identify patients at risk of poor outcomes from infection, particularly sepsis. It comprises exactly three clinical variables: Systolic Blood Pressure (SBP) ≤100 mmHg, Respiratory Rate (RR) ≥22 breaths/min, and Altered mental status (GCS score <15). Each component scores 1 point, with a maximum score of 3. A qSOFA score ≥2 predicts increased mortality and prolonged ICU stay in septic patients. In this case, the patient meets all three criteria: SBP 90 mmHg (≤100), RR 24 (≥22), and GCS 10 (<15), yielding a qSOFA score of 3—indicating very high risk. The qSOFA was developed as a simpler alternative to SIRS criteria and SOFA score for rapid risk stratification in resource-limited settings, making it particularly relevant in Indian clinical practice where quick bedside assessment guides triage and ICU admission decisions. It does NOT include laboratory parameters like creatinine or CBC, which are part of the full SOFA score but not the quick version.
Why the other options are wrong
A. Creatinine, PR, Body temperature — This is wrong because qSOFA does not include serum creatinine (a laboratory marker of organ dysfunction) or pulse rate in its calculation. Creatinine is part of the full SOFA score, not qSOFA. The 'quick' version deliberately excludes lab values to enable bedside assessment without waiting for results—a critical advantage in sepsis management where time is critical. B. RR, Body temperature, PR — This is wrong because qSOFA does not include body temperature or pulse rate. While these are components of SIRS criteria (which require fever/hypothermia and tachycardia), they are not part of qSOFA. The qSOFA focuses on three specific variables: SBP, RR, and GCS—not vital signs like temperature or HR. D. BP, RR and CBC — This is wrong because qSOFA does not include CBC (Complete Blood Count) or any laboratory parameters. While CBC showing leucocytosis with neutrophilia supports infection, it is not part of the qSOFA score. qSOFA is intentionally a clinical-only tool; CBC is part of diagnostic workup for sepsis but not the prognostic qSOFA calculation.
High-Yield Facts
- qSOFA score comprises three variables: SBP ≤100 mmHg, RR ≥22 breaths/min, and GCS <15 (altered mental status).
- qSOFA ≥2 predicts increased mortality and ICU admission in septic patients; each point = 1 risk factor.
- qSOFA is bedside-only: no lab values required, enabling rapid risk stratification in emergency/ICU settings.
- qSOFA vs SOFA: qSOFA is quick (3 clinical variables); full SOFA includes 5 organ systems with lab values (lactate, creatinine, bilirubin, platelets, vasopressor use).
- SIRS criteria (fever, HR >90, RR >20, WBC abnormality) are different from qSOFA and less specific for sepsis outcomes.
Mnemonics
qSOFA = SRG SBP ≤100, RR ≥22, GCS <15. Memory hook: 'SRG' for Systolic-Respiratory-Glasgow. Use this at the bedside in <30 seconds to risk-stratify septic patients. Quick vs Full SOFA Quick = 3 clinical signs (no labs). Full = 5 organs (includes labs). When time is critical (ED/ICU), use qSOFA; when you have time and labs, use full SOFA for detailed organ dysfunction assessment.
NBE Trap
NBE pairs qSOFA with laboratory parameters (creatinine, CBC) to trap students who confuse it with the full SOFA score or SIRS criteria. The key discriminator is that qSOFA is deliberately bedside-only, requiring no lab results—this is its defining advantage in rapid sepsis triage.
Clinical Pearl
In Indian emergency departments and ICUs, qSOFA is the go-to tool for rapid sepsis risk stratification because it requires no lab turnaround time—critical in settings with resource constraints. A qSOFA ≥2 should trigger immediate ICU evaluation and broad-spectrum antibiotics per RNTCP/sepsis protocols, as seen in this patient with fever, hypotension, tachypnea, and altered sensorium.
_Reference: Harrison Ch. 297 (Sepsis and Septic Shock); Surviving Sepsis Campaign Guidelines (endorsed by Indian Society of Critical Care Medicine)_