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Schlehofer et al., 1992.
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Population-based case–control
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226 cases in Rhein-Neckar-Odenwald area of Germany with primary brain tumors diagnosed 1987–1988; controls, 418 randomly selected from residential registers
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Self-reported history of head injury requiring medical attention; obtained by interview
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Primary brain tumors (ICD-9 191, 191.1, 192.0), restricted to gliomas (115), meningiomas (81), acoustic neuromas (30)
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For all tumor types: 46 of 226 (20%) vs 113 of 418 (27%); RR, 0.71 (95% CI, 0.5–1.1)
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Age-, sex-matching for controls
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418 of 521 (72%) potential controls participated; self-reports of head trauma; no comparisons by severity or number of injuries
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NOTE: CI = confidence interval, CNS = central nervous system, CT = computed tomography, ED = emergency department, ICD = International Classification of Diseases, LOC = loss of consciousness, OR = odds ratio, PT = posttrauma, PTA = posttraumatic amnesia, RDD = random-digit dialing, RR = relative risk, SES = socioeconomic status, SIR = standardized incidence ratio, TBI = traumatic brain injury.
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