Cancer incidence in cohorts of workers in the rubber manufacturing industry first employed since 1975 in the UK and Sweden

M Boniol, A Koechlin, T Sorahan, K Jakobsson, P Boyle

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

OBJECTIVES: Increased cancer risks have been reported among workers in the rubber manufacturing industry employed before the 1960s, but it is unclear for workers hired subsequently. The present study focused on cancer incidence among rubber workers first employed after 1975 in Sweden and the UK.

METHODS: Two cohorts of rubber workers employed for at least 1 year were analysed. Standardised incidence ratios (SIRs), based on country-specific and period-specific incidence rates, were analysed for all cancers combined (except non-melanoma skin), bladder, lung, stomach cancer, leukaemia, non-Hodgkin's lymphoma and multiple myeloma. Exploratory analyses were conducted for other cancers with a minimum of 10 cases in both genders combined.

RESULTS: 16 026 individuals (12 441 men; 3585 women) contributed to 397 975 person-years of observation, with 846 cancers observed overall (437 in the UK, 409 in Sweden). No statistically significant increased risk was observed for any site of cancer. A reduced risk was evident for all cancers combined (SIR=0.83, 95% CI (0.74 to 0.92)), lung cancer (SIR=0.74, 95% CI (0.59 to 0.93)), non-Hodgkin's lymphoma (SIR=0.67, 95% CI (0.45 to 1.00)) and prostate cancer (SIR=0.77, 95% CI (0.64 to 0.92)). For stomach cancer and multiple myeloma, SIRs were 0.93 (95% CI (0.61 to 1.43)) and 0.92 (95% CI 0.44 to 1.91), respectively. No increased risk of bladder cancer was observed (SIR=0.88, 95% CI (0.61 to 1.28)).

CONCLUSIONS: No significantly increased risk of cancer incidence was observed in the combined cohort of rubber workers first employed since 1975. Continued surveillance of the present cohorts is required to confirm absence of long-term risk and confirmatory findings from other cohorts would be important.

LanguageEnglish
JournalOccupational and Environmental Medicine
Early online date6 Jan 2017
DOIs
Publication statusE-pub ahead of print - 6 Jan 2017

Fingerprint

Sweden
Manufacturing Industries
Rubber
Incidence
Cancer
Neoplasms
Non-Hodgkin's Lymphoma
Lung Cancer
Multiple Myeloma
Stomach Neoplasms
Lung Neoplasms
Manufacturing Industry
Bladder Cancer
Prostate Cancer
Leukemia
Urinary Bladder Neoplasms
Surveillance
Skin
Prostatic Neoplasms
Person

Keywords

  • cancer risks
  • rubber manufacturing industry
  • rubber workers

Cite this

@article{8858a9b8283b4a8899548923c8cfaad4,
title = "Cancer incidence in cohorts of workers in the rubber manufacturing industry first employed since 1975 in the UK and Sweden",
abstract = "OBJECTIVES: Increased cancer risks have been reported among workers in the rubber manufacturing industry employed before the 1960s, but it is unclear for workers hired subsequently. The present study focused on cancer incidence among rubber workers first employed after 1975 in Sweden and the UK.METHODS: Two cohorts of rubber workers employed for at least 1 year were analysed. Standardised incidence ratios (SIRs), based on country-specific and period-specific incidence rates, were analysed for all cancers combined (except non-melanoma skin), bladder, lung, stomach cancer, leukaemia, non-Hodgkin's lymphoma and multiple myeloma. Exploratory analyses were conducted for other cancers with a minimum of 10 cases in both genders combined.RESULTS: 16 026 individuals (12 441 men; 3585 women) contributed to 397 975 person-years of observation, with 846 cancers observed overall (437 in the UK, 409 in Sweden). No statistically significant increased risk was observed for any site of cancer. A reduced risk was evident for all cancers combined (SIR=0.83, 95{\%} CI (0.74 to 0.92)), lung cancer (SIR=0.74, 95{\%} CI (0.59 to 0.93)), non-Hodgkin's lymphoma (SIR=0.67, 95{\%} CI (0.45 to 1.00)) and prostate cancer (SIR=0.77, 95{\%} CI (0.64 to 0.92)). For stomach cancer and multiple myeloma, SIRs were 0.93 (95{\%} CI (0.61 to 1.43)) and 0.92 (95{\%} CI 0.44 to 1.91), respectively. No increased risk of bladder cancer was observed (SIR=0.88, 95{\%} CI (0.61 to 1.28)).CONCLUSIONS: No significantly increased risk of cancer incidence was observed in the combined cohort of rubber workers first employed since 1975. Continued surveillance of the present cohorts is required to confirm absence of long-term risk and confirmatory findings from other cohorts would be important.",
keywords = "cancer risks, rubber manufacturing industry, rubber workers",
author = "M Boniol and A Koechlin and T Sorahan and K Jakobsson and P Boyle",
note = "Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.",
year = "2017",
month = "1",
day = "6",
doi = "10.1136/oemed-2016-103989",
language = "English",
journal = "Occupational and Environmental Medicine",
issn = "1351-0711",

}

TY - JOUR

T1 - Cancer incidence in cohorts of workers in the rubber manufacturing industry first employed since 1975 in the UK and Sweden

AU - Boniol, M

AU - Koechlin, A

AU - Sorahan, T

AU - Jakobsson, K

AU - Boyle, P

N1 - Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.

PY - 2017/1/6

Y1 - 2017/1/6

N2 - OBJECTIVES: Increased cancer risks have been reported among workers in the rubber manufacturing industry employed before the 1960s, but it is unclear for workers hired subsequently. The present study focused on cancer incidence among rubber workers first employed after 1975 in Sweden and the UK.METHODS: Two cohorts of rubber workers employed for at least 1 year were analysed. Standardised incidence ratios (SIRs), based on country-specific and period-specific incidence rates, were analysed for all cancers combined (except non-melanoma skin), bladder, lung, stomach cancer, leukaemia, non-Hodgkin's lymphoma and multiple myeloma. Exploratory analyses were conducted for other cancers with a minimum of 10 cases in both genders combined.RESULTS: 16 026 individuals (12 441 men; 3585 women) contributed to 397 975 person-years of observation, with 846 cancers observed overall (437 in the UK, 409 in Sweden). No statistically significant increased risk was observed for any site of cancer. A reduced risk was evident for all cancers combined (SIR=0.83, 95% CI (0.74 to 0.92)), lung cancer (SIR=0.74, 95% CI (0.59 to 0.93)), non-Hodgkin's lymphoma (SIR=0.67, 95% CI (0.45 to 1.00)) and prostate cancer (SIR=0.77, 95% CI (0.64 to 0.92)). For stomach cancer and multiple myeloma, SIRs were 0.93 (95% CI (0.61 to 1.43)) and 0.92 (95% CI 0.44 to 1.91), respectively. No increased risk of bladder cancer was observed (SIR=0.88, 95% CI (0.61 to 1.28)).CONCLUSIONS: No significantly increased risk of cancer incidence was observed in the combined cohort of rubber workers first employed since 1975. Continued surveillance of the present cohorts is required to confirm absence of long-term risk and confirmatory findings from other cohorts would be important.

AB - OBJECTIVES: Increased cancer risks have been reported among workers in the rubber manufacturing industry employed before the 1960s, but it is unclear for workers hired subsequently. The present study focused on cancer incidence among rubber workers first employed after 1975 in Sweden and the UK.METHODS: Two cohorts of rubber workers employed for at least 1 year were analysed. Standardised incidence ratios (SIRs), based on country-specific and period-specific incidence rates, were analysed for all cancers combined (except non-melanoma skin), bladder, lung, stomach cancer, leukaemia, non-Hodgkin's lymphoma and multiple myeloma. Exploratory analyses were conducted for other cancers with a minimum of 10 cases in both genders combined.RESULTS: 16 026 individuals (12 441 men; 3585 women) contributed to 397 975 person-years of observation, with 846 cancers observed overall (437 in the UK, 409 in Sweden). No statistically significant increased risk was observed for any site of cancer. A reduced risk was evident for all cancers combined (SIR=0.83, 95% CI (0.74 to 0.92)), lung cancer (SIR=0.74, 95% CI (0.59 to 0.93)), non-Hodgkin's lymphoma (SIR=0.67, 95% CI (0.45 to 1.00)) and prostate cancer (SIR=0.77, 95% CI (0.64 to 0.92)). For stomach cancer and multiple myeloma, SIRs were 0.93 (95% CI (0.61 to 1.43)) and 0.92 (95% CI 0.44 to 1.91), respectively. No increased risk of bladder cancer was observed (SIR=0.88, 95% CI (0.61 to 1.28)).CONCLUSIONS: No significantly increased risk of cancer incidence was observed in the combined cohort of rubber workers first employed since 1975. Continued surveillance of the present cohorts is required to confirm absence of long-term risk and confirmatory findings from other cohorts would be important.

KW - cancer risks

KW - rubber manufacturing industry

KW - rubber workers

U2 - 10.1136/oemed-2016-103989

DO - 10.1136/oemed-2016-103989

M3 - Article

JO - Occupational and Environmental Medicine

T2 - Occupational and Environmental Medicine

JF - Occupational and Environmental Medicine

SN - 1351-0711

ER -