Table 3.
Sensitivity (95% CI), Specificity (95% CI), PPV(95% CI) NPV(95% CI) of code lists for child maltreatment included sensitivity analysis of additional and exclusion of categories of.
| Sensitivity | Specificity | PPVa | NPVa | |||||
|---|---|---|---|---|---|---|---|---|
| Time 1b | Time 2c | Time 1b | Time 2c | Time 1b | Time 2c | Time 1b | Time 2c | |
| Confirmed CMd | 9.4 (7.2–12.2) | 10.3 (8.0–13.2) | 99.4 (98.9–99.7) | 99.0 (98.3–99.4) | 76.6 (74.8–78.4) | 76.7 (74.9–78.5) | 76.6 (74.8–78.4) | 76.7 (74.9–78.5) |
| ‘Other problems with primary support group' codes added | 14.5 (11.7–17.7) | 18.1 (15.0–21.6) | 98.4 (97.6–98.9) | 97.5 (96.6–98.2) | 74.8 (65.3–82.4) | 70.9 (62.6–78.1) | 77.5 (75.6–79.2) | 78.1 (76.2–79.8) |
| ‘Suspected/alleged maltreatment' codes added | 10.7 (8.3–13.6) | 11.8 (9.2–14.8) | 99.4 (98.9–99.7) | 99.0 (98.3–99.4) | 85.5 (74.5–92.5) | 79.3 (68.6–87.1) | 76.9 (75.0–78.6) | 77.0 (75.2–78.8) |
| ‘Rib/limb fractures/dislocations' codes added | 11.9 (9.4–15.0) | 14.5 (11.7–17.7) | 99.0 (98.3–99.4) | 98.1 (97.3–98.7) | 79.5 (69.0–87.3) | 72.1 (62.6–80.0) | 77.0 (75.2–78.8) | 77.4 (75.5–79.2) |
| ‘Assaults' codes added | 12.8 (10.2–16.0) | 14.8 (12.0–18.1) | 99.1 (98.5–99.5) | 98.5 (97.8–99.0) | 82.6 (72.5–89.6) | 77.4 (68.0–84.7) | 77.3 (75.4–79.0) | 77.6 (75.7–79.3) |
| Inclusion of all additional codes | 23.7 (20.2–27.5) | 27.8 (24.2–31.8) | 97.2 (96.2–97.9) | 96.4 (95.3–97.2) | 73.6 (66.4–79.8) | 72.0 (65.4–77.8) | 79.2 (77.3–80.9) | 80.0 (78.1–81.7) |
aPPV and NPV based on prevalence in validation population.
bHospital admission within 12 months before or after index date.
cHospital admission at any time.
dConfirmed CM codes encompass maltreatment related syndromes, genital mutilation and prostitution. Note that child protection codes are not available in hospital admissions data.