Table 1 Validation of recorded HA diagnosis in hospitalized cases, Quebec, 1990–2003
From: Trends of Hepatitis A hospitalization and risk factors in Quebec, Canada, between 1990 and 2003
Primary Diagnosis | 1st secondary | 2nd to 15th secondary¶ | Total | |
|---|---|---|---|---|
A – DEATHS | ||||
Deaths | 13 | 3 | 38 | 54 |
Charts received | 12 (92%) | 2 (67%) | 35(92%) | 49 (91%) |
After chart review | ||||
Confirmed acute HA * | 9 (75%) | 0 (0) | 2 (6%) | 11 (22%) |
Deaths related to HA * | 8 (67%) | 0 (0%) | 2 (6%) | 10 (20%) |
B – RANDOM SAMPLE | ||||
Records in MED-ECHO | 880 | 160 | 409 | 1449 |
Records sampled (sampling %) | 225 (26%) | 110 (67%) | 210 (51%) | 545 (38%) |
Charts received (% of requested records) | 216 (96%) | 103 (94%) | 205 (98%) | 524 (96%) |
After chart review | ||||
1)Confirmed acute HA | ||||
caused hospitalization* | 170 (79%) | 8 (8%) | 4 (3%) | 182 (35%) |
did not cause hospitalization* | 1 (0.5%) | 6 (6%) | 11 (5%) | 18 (3%) |
2) No acute HA* | 45 (21%) | 89 (86%) | 190 (93%) | 324 (62%) |
Prior HA | 5 | 43 | 110 | 158 |
Infectious hepatitis but not A | 21 | 17 | 23 | 61 |
Non-infectious hepatitis | 19 | 21 | 30 | 70 |
No hepatitis | 0 | 7 | 24 | 31 |
Error in data entry | 0 | 1 | 3 | 4 |
Estimated number of hospitalizations attributable to HA † | 699 | 13 | 8 | 730 |