Advanced Risk Stratification: Understanding the BSI and FACED Scores

As you and your care team look toward the future, doctors use specialized “calculators” called risk stratification tools to move beyond guesswork. These tools, primarily the Bronchiectasis Severity Index (BSI) and the FACED score, help predict disease severity and guide personalized preventative care ^[1][2]. They aren’t meant to be “scary” numbers; instead, they help your doctor decide how aggressively to treat your symptoms to prevent future problems ^[3].

The Bronchiectasis Severity Index (BSI)

The BSI is the most detailed tool available. It uses nine different “ingredients” from your medical history to calculate a total score ^[1]:

1. Age: Risk naturally increases as we get older.
2. BMI: Interestingly, having a low Body Mass Index (being underweight) is a risk factor for more severe disease ^[1].
3. FEV1: A measure of how much air you can blow out in one second.
4. Hospitalizations: If you were hospitalized for a lung infection in the last year.
5. Exacerbations: The number of flare-ups you had in the last year.
6. Dyspnea: Your level of shortness of breath (using the mMRC scale).
7. Pseudomonas: Whether you are chronically colonized by this specific bacteria ^[1].
8. Other Bacteria: If you have chronic infections with other germs.
9. Radiological Extension: How many lobes of your lung show damage on your CT scan ^[1].

What the Score Means:

• Low (0–4): Low risk of hospitalization or severe flare-ups in the near future.
• Intermediate (5–8): Moderate risk; your doctor may escalate your airway clearance or monitoring.
• High (9+): High risk for frequent hospitalizations ^[1]. This score often triggers more aggressive preventative treatments, like long-term inhaled antibiotics ^[4].

The FACED and E-FACED Scores

The FACED score is a simpler, five-point system often used to evaluate overall disease severity ^[1][5]. It stands for:

• F: FEV1 (Lung function)
• A: Age
• C: Colonization (Pseudomonas)
• E: Extension (Lobes affected on CT)
• D: Dyspnea (Shortness of breath)

Because the original FACED score didn’t account for flare-ups, doctors often use the E-FACED (or Exa-FACED) version. This adds an “E” for Exacerbations—specifically, you get two extra points if you had two or more flare-ups in the last year ^[6][7]. This makes the tool much better at predicting who might have another “bad stretch” in the near future ^[8].

The Role of the BACI

While BSI and FACED focus on your lungs, the BACI (Bronchiectasis Aetiology Comorbidity Index) looks at the “rest of you” ^[9]. It tracks 13 other health conditions—like heart disease or diabetes—that could impact your recovery from a lung infection. When used alongside the BSI, it gives the most complete picture of your overall health outlook ^[9][10].

Limitations to Keep in Mind

These scores are helpful guides, but they aren’t perfect:

• Population Differences: They may under-predict risk for certain groups, such as those who developed bronchiectasis after tuberculosis or in specific Indigenous populations ^[11][12].
• Snapshot in Time: These scores represent your health right now. A high score today doesn’t mean you can’t improve; through better airway clearance and treatment, some factors (like exacerbation frequency) can be lowered over time ^[3].