Table S2.
PPV and completeness of diagnosis codes in Danish National Patient Registry by number of in- or outpatient contacts
| Diagnosis codes | PPV or completeness | At least one contact | At least two contacts | At least three contacts |
|---|---|---|---|---|
| 255.29, D350A, E275xa, R825A, or ZM8700xa as primary, secondary, supplementary, or referral diagnosis code | PPV | 21.7% (18.6–25.0) | 54.5% (47.7–61.3) | 72.3% (64.0–79.6) |
| Completeness | 72.7% (66.0–78.8) | 60.6% (53.4–67.5) | 50.0% (42.8–57.2) | |
| 255.29, D350A, or ZM8700xa as primary, secondary, supplementary, or referral diagnosis code | PPV | 24.9% (21.1–28.9) | 56.4% (48.6–63.9) | 75.7% (66.8–83.2) |
| Completeness | 63.1% (56.0–69.9) | 49.0% (41.8–56.2) | 43.9% (36.9–51.2) | |
| 255.29, D350A, or ZM8700xa without referral diagnosis codes | PPV | 27.0% (23.0–31.3) | 59.3% (51.3–66.9) | 76.3% (67.4–83.8) |
| Completeness | 62.1% (55.0–68.9) | 48.5% (41.3–55.7) | 43.9% (36.9–51.2) | |
| 255.29, D350A, or ZM8700xa as primary diagnosis codes | PPV | 47.7% (41.3–54.2) | 75.9% (67.0–83.3) | 85.9% (76.6–92.5) |
| Completeness | 58.1% (50.9–65.0) | 44.4% (37.4–51.7) | 36.9% (30.1–44.0) | |
| 255.29, D350A, or ZM8700xa at any endocrine departmentsb | PPV | 42.4% (35.6–49.4) | 77.3% (66.2–86.2) | 82.1% (66.5–92.5) |
| Completeness | 44.9% (37.9–52.2) | 29.3% (23.1–36.2) | 16.2% (11.3–22.0) | |
| 255.29, D350A, or ZM8700xa at tertiary endocrine departmentsb | PPV | 46.3% (39.1–53.7) | 77.0% (65.8–86.0) | 82.1% (66.5–92.5) |
| Completeness | 44.4% (37.4–51.7) | 28.8% (22.6–35.6) | 16.2% (11.3–22.0) |
Notes:
a
Including underlying codes.
b
Not including referral diagnosis codes to endocrine departments.
Abbreviations: PPV, positive predictive value.