Q Sofa Calculator - Sepsis-3 Bedside Tally

The q sofa calculator is a bedside sepsis screening tool that totals three Sepsis-3 clinical criteria (SBP, RR, and GCS) and returns a 0-3 score separating low from high in-hospital mortality risk in adults with suspected infection outside the ICU.

• • ED triage: An adult with suspected infection being admitted from the emergency department who needs a rapid risk band.
• • Ward screening: A nurse or rapid response team member rechecking a patient whose vitals or mental status have just changed.
• • Pre-ICU hand-off: A trainee preparing the hand-off note before paging the ICU team, so the qSOFA band and sub-scores are easy to quote.
• • Sepsis-3 documentation: A sepsis coordinator reviewing which admitted patients triggered the high-risk band so the bundle of care is documented.

The q sofa calculator was published in 2016 with the Sepsis-3 framework and was designed for the bedside, not a computer, because each criterion can be measured in under a minute.

For the patient who is already in the ICU, severity-of-illness models such as the APACHE II Calculator provide a more complete picture of ICU mortality risk.

The calculator reads three Sepsis-3 criteria, scores each as 0 or 1, sums them on the published 0-3 scale, and labels the result with the corresponding in-hospital mortality band.

• mentalStatus: 1 point if Glasgow Coma Scale is less than 15, otherwise 0.
• respiratoryRate: 1 point if respiratory rate is 22 breaths per minute or higher, otherwise 0.
• systolicBP: 1 point if systolic blood pressure is 100 mmHg or lower, otherwise 0.

The thresholds are fixed: SBP of 100 mmHg or less, RR of 22/min or more, and a GCS below 15 each contribute exactly one point, with no weighting.

The 0-1 band is low in-hospital mortality risk; 2-3 is high, with a 3- to 14-fold increase in hospital mortality across deciles of baseline risk.

According to Singer et al. JAMA 2016, the quick SOFA score is the sum of one point each for systolic blood pressure of 100 mmHg or less, respiratory rate of 22 breaths per minute or more, and altered mentation defined as a Glasgow Coma Scale score under 15.

According to Seymour et al. JAMA 2016, encounters outside the ICU with a qSOFA score of 2 or higher had a 3- to 14-fold increase in in-hospital mortality across deciles of baseline risk compared with scores of 1 or lower.

When a high-risk qSOFA band prompts a broader acid-base and metabolic review, the Anion Gap Calculator turns the basic metabolic panel into the serum AG and the albumin-corrected AG that run alongside the sepsis workup.

Each Sepsis-3 criterion captures one organ-system sign of decompensation, and the 0-1 versus 2-3 band is what drives the bedside escalation decision.

The criteria were derived from the Sepsis-3 validation cohort of 148,907 encounters, where non-ICU qSOFA scores of 2 or higher carried a 3- to 14-fold increase in in-hospital mortality across deciles of baseline risk.

For an undifferentiated abdominal source that triggered the high-risk qSOFA band, the Alvarado Score Calculator structures the same kind of bedside clinical review for suspected appendicitis.

Treat the calculator as a bedside chart-review checklist: confirm the patient is outside the ICU, score each criterion against the Sepsis-3 threshold, and read the band before deciding on escalation.

1. 1 Confirm the setting and preconditions: Confirm the patient is at least 18, has a suspected infection, and is being assessed outside the ICU. The full SOFA score is the recommended in-ICU organ-failure tool, not the qSOFA.
2. 2 Score the mental status against a Glasgow Coma Scale of 15: Add the eye, verbal, and motor GCS sub-scores. A total of 15 earns zero points; anything below 15 earns one point. If the GCS cannot be assessed, follow local protocol and document the limitation; the Sepsis-3 paper does not specify a default for un-assessable patients.
3. 3 Count the respiratory rate against 22 breaths per minute: Count chest rises for 30 seconds and multiply by 2 (or 20 seconds and multiply by 3). Twenty-two or higher earns one point; under 22 earns zero.
4. 4 Read the systolic blood pressure against 100 mmHg: Use a cuff or an arterial line and confirm a borderline value on a second measurement. A reading of 100 mmHg or lower earns one point.
5. 5 Sum the three sub-scores on the 0-3 scale: Add the three sub-scores. The total is an integer between 0 and 3 and is the published qSOFA score, not a weighted index.
6. 6 Read the risk band and pair it with the rest of the chart: A total of 0 or 1 sits in the low in-hospital mortality risk band; 2 or 3 sits in the high band. Document the sub-scores in the chart note and pair the result with the full SOFA score, lactate, and the suspected source of infection.

A 68-year-old with community-acquired pneumonia and new confusion. GCS 14, RR 24, SBP 110 mmHg. qSOFA = 0 + 1 + 0 = 1, low risk band. Send blood cultures and reassess in 30 to 60 minutes.

When the qSOFA prompt leads to a sepsis workup that includes creatinine, drug dosing, and contrast imaging, the GFR Calculator supports the kidney-function review that runs in parallel.

A bedside qSOFA review can be done with a clipboard, but a calculator keeps the sub-scores traceable, ties the band to the published predictive validity, and standardizes the chart note.

• • Bedside speed: The three Sepsis-3 criteria can be measured in under a minute, which keeps the qSOFA review usable at triage, on a ward round, or during a rapid response call.
• • Traceable chart record: Each sub-score and the total are recorded together, so a later reviewer or sepsis coordinator can challenge the inputs without re-measuring the patient.
• • Tied to published predictive validity: The 2-3 band reflects the Sepsis-3 finding of a 3- to 14-fold increase in in-hospital mortality across deciles of baseline risk, so the calculator's red flag is anchored in a peer-reviewed cohort.
• • Standardized escalation prompt: Pharmacy, nursing, and the rapid response team can use the same 0-1 versus 2-3 language in the chart note, which makes the escalation step easier to defend in a quality review.

The qSOFA score was designed to make the prompt-to-evaluate step easier to discuss. The calculator keeps that goal front and centre but does not diagnose sepsis, prescribe antibiotics, or replace the Sepsis-3 organ-failure review.

When the high-risk qSOFA band overlaps with a coagulopathy workup, the Fresh Frozen Plasma Dose Calculator helps the team plan the volume and bag count for the plasma component of resuscitation.

Several clinical and workflow factors can move the qSOFA result up or down without reflecting a real change in sepsis risk.

• • The qSOFA score is a prompt to consider sepsis, not a diagnostic test. A 0-1 score does not rule out infection. The Surviving Sepsis Campaign 2021 Hour-1 bundle (lactate, blood cultures, broad-spectrum antibiotics within one hour) applies once sepsis is clinically suspected, not because a qSOFA score reaches 2.
• • Inter-rater agreement on the altered-mentation criterion is moderate. Two clinicians can score the same patient differently when drowsiness, delirium, or aphasia is present, so the GCS sub-score belongs in the chart note.

The Sepsis-3 cohort enrolled non-ICU adult patients with suspected infection, so the qSOFA score should not be used as a stand-alone diagnostic tool in trauma, post-operative, obstetric, or pediatric populations.

According to Surviving Sepsis Campaign 2021, the qSOFA score can be used at the bedside to prompt further evaluation for sepsis and organ dysfunction but is not, on its own, a diagnostic criterion for sepsis.

When the suspected source is community-acquired pneumonia, the Pneumonia Severity Index lays out the parallel risk-class review that runs alongside the qSOFA band.