Dentists, dental nurses, and brain tumours
There is We investigated the risk of intracranial tumours in several occupational groups in a research programme. In this report we present the risks of glioblastoma among dentists and dental nurses.
Subjects, methods, Cohorts of dentists the years 1961-79. There were 3454 male dentists, 1125 female dentists, and 4662 female dental nurses. The (ICD 193-0) The -recorded in the cancer registry.The analysis was based on the standardised morbidity ratio-that is, the ratio of the observed number of cases to the expected number-with 95% confidence limits.5 For comparison standardised morbidity ratios for physicians and nurses were also calculated.for meningioma the standardised morbidity ratio was 1-3. For all tumours combined the standardised morbidity ratio was 1-0 or 1 1 for all the different groups. The standardised morbidity ratio for glioblastoma among physicians and nurses was estimated as 1-3 and 1-2, respectively, with unity well within the confidence intervals.
Comment Although the The-basis for the diagnosis was either biopsy or necropsy We did
not take into account deaths might
possibly general
population Random
fluctuations be
set the of the
standard mortality ratio's for dentists and dental nurses and male and female dentists.
In conclusion, we think it mentioned
above or factors known to be related to the observed excess common
to or radiography. 1 Neurol 1977;214.241-50. 2 and
prevention. Philadelphia, Pa: W R Saunders, 1982:%8-83. 3 Swedish chemists graduating during three decades. A architects. Environ Res
1980;22:154-61. 4 Atlas of tumor pathology.
Washington, DC: Arned 1952.
5 Rothman Mass: Epidemiology Resources, 1982:30-1. (Accepted December 1985) Department of Epidemiology, National Institute ofEnvironmental Medicine, Stockholm, Sweden ANDERS AHLBOM, PHD, professor STAFFAN NORELL,mD, associate professor YVALL RODVALL, BA, research assistant Department Institute, Stockholm, Sweden
MAGNUS NYLANDER, DD, research assistant Correspondence Dr Ahlbom. Observed and expected numbers of nurses* Observed Expected 95%
No of No of morbidity Confidence Diagnosis and category tumours tumours ratio limit Glioblastoma (astrocytoma III-IV) 18 8-47 2-1 13-34 Dentists, male 9 4 56 2-0 3-7
Dentists, female 3 1-22 2-5 0 5- 7-2 Dental nurses, female 6 2-69 2-2 0-8- 4 9 Physicians 11 8-48 1-3 0-6-2-3 Nurses, female 23 19-36 0-8-1-8
Glioma (astrocytoma I-II) 4 2-20 1-8 5-4 7
Dentists, male 2 0 99 2-0 7-3
Dentists, female 0-24 00 00-154 Dentalnurses,female 2 097 2-1 0-2- 7-4 Meningioma 6 4-59 1-3 0-5-2-8 Dentists,male 7- 66 Dentists, female 1 1-00 1-0 0-0- 5-6
Dental nurses, female 1 2-03 0 5 0 0- 2-7 All tumours 5% 572-31 1.0 10-1 1 Dentists, male 288 276-20 1-0 0 9- 1 2 Dentists, female 97 98-78 10 0-8- 1-2 Dentalnurses,female 211 197-33 1.1 09- 1-2 *Gioma for sex, age, and county. The table shows that among dentists and dental nurses glioblastoma was about twice as common as expected. For glioma the standardised morbidity ratio for the entire study population was 1-8, although with a wide confidence interval, while
We investigated the risk of intracranial tumours in several occupational groups in a research programme.
In this report we present the risks of glioblastoma among dentists and dental nurses.
Subjects, methods, Cohorts of dentists the years 1961-79. There were 3454 male dentists, 1125 female dentists, and 4662 female dental nurses. The (ICD 193-0) The -recorded in the cancer registry.The analysis was based on the standardised morbidity ratio-that is, the ratio of the observed number of cases to the expected number-with 95% confidence limits.5 For comparison standardised morbidity ratios for physicians and nurses were also calculated.for meningioma the standardised morbidity ratio was 1-3. For all tumours combined the standardised morbidity ratio was 1-0 or 1 1 for all the different groups. The standardised morbidity ratio for glioblastoma among physicians and nurses was estimated as 1-3 and 1-2, respectively, with unity well within the confidence intervals.
Comment Although the The-basis for the diagnosis was either biopsy or necropsy We did
not take into account deaths might
possibly general
population Random
fluctuations be
set the of the
standard mortality ratio's for dentists and dental nurses and male and female dentists.
In conclusion, we think it mentioned
above or factors known to be related to the observed excess common
to or radiography. 1 Neurol 1977;214.241-50. 2 and
prevention. Philadelphia, Pa: W R Saunders, 1982:%8-83. 3 Swedish chemists graduating during three decades. A architects. Environ Res
1980;22:154-61. 4 Atlas of tumor pathology.
Washington, DC: Arned 1952.
5 Rothman Mass: Epidemiology Resources, 1982:30-1. (Accepted December 1985) Department of Epidemiology, National Institute ofEnvironmental Medicine, Stockholm, Sweden ANDERS AHLBOM, PHD, professor STAFFAN NORELL,mD, associate professor YVALL RODVALL, BA, research assistant Department Institute, Stockholm, Sweden
MAGNUS NYLANDER, DD, research assistant Correspondence Dr Ahlbom. Observed and expected numbers of nurses* Observed Expected 95%
No of No of morbidity Confidence Diagnosis and category tumours tumours ratio limit Glioblastoma (astrocytoma III-IV) 18 8-47 2-1 13-34 Dentists, male 9 4 56 2-0 3-7
Dentists, female 3 1-22 2-5 0 5- 7-2 Dental nurses, female 6 2-69 2-2 0-8- 4 9 Physicians 11 8-48 1-3 0-6-2-3 Nurses, female 23 19-36 0-8-1-8
Glioma (astrocytoma I-II) 4 2-20 1-8 5-4 7
Dentists, male 2 0 99 2-0 7-3
Dentists, female 0-24 00 00-154 Dentalnurses,female 2 097 2-1 0-2- 7-4 Meningioma 6 4-59 1-3 0-5-2-8 Dentists,male 7- 66 Dentists, female 1 1-00 1-0 0-0- 5-6
Dental nurses, female 1 2-03 0 5 0 0- 2-7 All tumours 5% 572-31 1.0 10-1 1 Dentists, male 288 276-20 1-0 0 9- 1 2 Dentists, female 97 98-78 10 0-8- 1-2 Dentalnurses,female 211 197-33 1.1 09- 1-2 *Gioma for sex, age, and county. The table shows that among dentists and dental nurses glioblastoma was about twice as common as expected. For glioma the standardised morbidity ratio for the entire study population was 1-8, although with a wide confidence interval, while
We investigated the risk of intracranial tumours in several occupational groups in a research programme.
In this report we present the risks of glioblastoma among dentists and dental nurses.
Subjects, methods, Cohorts of dentists the years 1961-79. There were 3454 male dentists, 1125 female dentists, and 4662 female dental nurses. The (ICD 193-0) The -recorded in the cancer registry.The analysis was based on the standardised morbidity ratio-that is, the ratio of the observed number of cases to the expected number-with 95% confidence limits.5 For comparison standardised morbidity ratios for physicians and nurses were also calculated.for meningioma the standardised morbidity ratio was 1-3. For all tumours combined the standardised morbidity ratio was 1-0 or 1 1 for all the different groups. The standardised morbidity ratio for glioblastoma among physicians and nurses was estimated as 1-3 and 1-2, respectively, with unity well within the confidence intervals.
Comment Although the The-basis for the diagnosis was either biopsy or necropsy We did
not take into account deaths might
possibly general
population Random
fluctuations be
set the of the
standard mortality ratio's for dentists and dental nurses and male and female dentists.
In conclusion, we think it mentioned
above or factors known to be related to the observed excess common
to or radiography. 1 Neurol 1977;214.241-50. 2 and
prevention. Philadelphia, Pa: W R Saunders, 1982:%8-83. 3 Swedish chemists graduating during three decades. A architects. Environ Res
1980;22:154-61. 4 Atlas of tumor pathology.
Washington, DC: Arned 1952.
5 Rothman Mass: Epidemiology Resources, 1982:30-1. (Accepted December 1985) Department of Epidemiology, National Institute ofEnvironmental Medicine, Stockholm, Sweden ANDERS AHLBOM, PHD, professor STAFFAN NORELL,mD, associate professor YVALL RODVALL, BA, research assistant Department Institute, Stockholm, Sweden
MAGNUS NYLANDER, DD, research assistant Correspondence Dr Ahlbom. Observed and expected numbers of nurses* Observed Expected 95%
No of No of morbidity Confidence Diagnosis and category tumours tumours ratio limit Glioblastoma (astrocytoma III-IV) 18 8-47 2-1 13-34 Dentists, male 9 4 56 2-0 3-7
Dentists, female 3 1-22 2-5 0 5- 7-2 Dental nurses, female 6 2-69 2-2 0-8- 4 9 Physicians 11 8-48 1-3 0-6-2-3 Nurses, female 23 19-36 0-8-1-8
Glioma (astrocytoma I-II) 4 2-20 1-8 5-4 7
Dentists, male 2 0 99 2-0 7-3
Dentists, female 0-24 00 00-154 Dentalnurses,female 2 097 2-1 0-2- 7-4 Meningioma 6 4-59 1-3 0-5-2-8 Dentists,male 7- 66 Dentists, female 1 1-00 1-0 0-0- 5-6
Dental nurses, female 1 2-03 0 5 0 0- 2-7 All tumours 5% 572-31 1.0 10-1 1 Dentists, male 288 276-20 1-0 0 9- 1 2 Dentists, female 97 98-78 10 0-8- 1-2 Dentalnurses,female 211 197-33 1.1 09- 1-2 *Gioma for sex, age, and county. The table shows that among dentists and dental nurses glioblastoma was about twice as common as expected. For glioma the standardised morbidity ratio for the entire study population was 1-8, although with a wide confidence interval, while