Permanent Bilateral Sensory and Neural Hearing Loss of Children After Neonatal Intensive Care Because of Extreme Prematurity: A Thirty-Year Study
Bibliographic record
Abstract
OBJECTIVE: We present population-based, childhood prevalence rates of and neonatal risk factors for permanent hearing loss among extremely premature infants. METHODS: By using an inception-cohort, longitudinal study design for 1974-2003, we studied permanent hearing loss among 1279 survivors with gestational age of < or =28 weeks and birth weight of <1250 g (mortality rate: 42.7%; lost to follow-up monitoring: 4.7%) Newborn hearing screening, performed by experienced pediatric audiologists, used click-evoked auditory brainstem response testing after 1975. Survivors underwent repeated behavioral audiologic testing and multidisciplinary follow-up monitoring. Permanent hearing loss was defined as mild/moderate (26-70 dB hearing level), severe/profound (71 to >90 dB hearing level), delayed-onset (diagnosed after previously normal hearing), or progressive (increase in loss of > or =15 dB hearing level). Permanent hearing loss rates were established at 3 years of age, with newborn, infant, and >5-year final hearing outcomes being recorded. Risk factors were compared for children with and without hearing loss, odds ratios were calculated, and prediction performance was determined through area under the curve analysis. RESULTS: Forty (3.1%) of 1279 survivors 3 years of age had permanent hearing loss and 24 (1.9%) had severe/profound loss, with no changes over time. Bilateral delayed-onset loss occurred for 4 children (10%) and progressive loss for 11 children (28%). One child had auditory neuropathy, and 29 (73%) had multiple disabilities. Prolonged oxygen use, gastrointestinal surgery, patent ductus arteriosus ligation, and low socioeconomic index yielded good prediction of permanent hearing loss; oxygen use was the most significant predictor of severe/profound loss. CONCLUSIONS: Permanent hearing loss remains an adverse outcome of extreme prematurity, complicated by significant delayed-onset and progressive loss. Prolonged supplemental oxygen use is a marker for predicting permanent hearing loss; this requires detailed analysis of the pathophysiologic features, to reduce the prevalence of permanent hearing loss.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| 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".