Epidemiology and outcome of bacterial meningitis in Canadian children: 1998-1999.
Bibliographic record
Abstract
BACKGROUND: The introduction of Hemophilus influenzae type b (Hib) conjugate vaccine as part of the routine childhood vaccination schedule in Canada has resulted in a dramatic reduction in the cases of Hib meningitis. We describe the epidemiology and outcome of bacterial meningitis in Canadian children six years after the introduction of Hib conjugate vaccine and prior to the introduction of the conjugate Streptococcus pneumoniae vaccine. METHODS: A retrospective chart review from January 1998 to December 1999 of children with meningitis identified at eight Canadian tertiary care children's hospitals belonging to the PICNIC network. RESULTS: Bacterial meningitis was documented in 104 (11%) of 970 children presenting with meningitis. The most common isolated organisms were: Streptococcus pneumoniae (54%), group B streptococci (13%), and Neisseria meningitidis (11%). The mean age was 2.2 +/- 3.5 yr. Forty seven percent of the children required admission to Intensive Care Unit (ICU), and 19% required artificial ventilation. Sequelae were documented among 32 children (31%) prior to discharge and there were 6 (5.6%) deaths attributable to meningitis and sepsis. CONCLUSIONS: Bacterial meningitis is an important cause of morbidity in Canadian children with S. pneumoniae replacing H. influenzae as the leading potentially vaccine preventable cause. Despite proper initiation of antimicrobial therapy, meningitis results in great morbidity and mortality in children in Canada.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".