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* Department of Pediatrics, VU Medical Center, Amsterdam, the Netherlands
Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
Center of Biostatistics, University Medical Center Utrecht, Utrecht, the Netherlands
|| Division of Neuropsychology, Wilhelmina Childrens Hospital, University Medical Center Utrecht, Utrecht, the Netherlands
Objectives. To establish the incidence of sensorineural hearing loss in children who survived nonHaemophilus influenzae type B (Hib) bacterial meningitis, to highlight the actual percentage whose hearing was evaluated, and to develop a prediction rule to identify those who are at risk of hearing loss.
Methods. In 1999, we compiled a cohort of 628 school-aged children who were born between January 1986 and December 1994 and had survived non-Hib bacterial meningitis between January 1990 and December 1995. Presence of sensorineural hearing loss (>25 dB) was determined, based on information from questionnaires and medical records. Potential risk factors for hearing loss were obtained from medical records; independent predictors were identified using multivariate logistic regression analysis, leading to the formulation of a prediction rule.
Results. The incidence of hearing loss was 7%. The hearing of 68% of the children was evaluated as part of their routine follow-up after bacterial meningitis, resulting in the detection of 75% of the cases of hearing loss. The remaining 25% were detected after this follow-up had ended. Using a prediction rule based on 5 factorsduration of symptoms before admission >2 days, absence of petechiae, cerebrospinal fluid glucose level
0.6 mmol/L, Streptococcus pneumoniae, and ataxia62% of the postmeningitic children were selected as being at risk. All cases of hearing loss were in this at-risk group.
Conclusions. Hearing loss can be predicted satisfactorily. When the hearing of children who are predicted to be at risk is tested as part of their routine follow-up, no children with hearing loss need be missed.
Key Words: bacterial meningitis cohort study hearing assessment hearing impairment prediction
Abbreviations: Hib, Haemophilus influenzae type B CSF, cerebrospinal fluid AUC, area under the curve
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