Thursday January 23, 2020

Quitting Smoking Reduces Risk of Bladder Cancer in Women: Study

Our study emphasizes the importance of primary prevention (by not beginning to smoke) and secondary prevention (through smoking cessation) in the prevention of bladder cancer among postmenopausal women

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Representational Image. Woman smoking. Image source: www.dailyjoint.com

Quitting smoking can reduce the risk of bladder cancer in older women, says a study, adding that the most significant reduction in risk occurred in the first 10 years after quitting.

The researchers used various statistical models to analyse the association between the years since quitting smoking and the risk of bladder cancer.

For the study, the researchers included data from 143,279 women, all of whom had supplied information on whether they had ever smoked cigarettes, how much they had smoked and whether they were current smokers.

The study found that 52.7 per cent of the women were categorised as “never smokers,” 40.2 per cent as former smokers, and 7.1 per cent as current smokers.

marijuana, cancer
Quitting smoking cuts bladder cancer risk in women. Pixabay

“Although bladder cancer is a fairly rare cancer type, representing an estimated 4.6 per cent of new cancer cases in 2019, it is the most common malignancy of the urinary system, with high recurrence rate and significant mortality,” said Yueyao Li, Ph.D candidate from the School of Public Health, Indiana University in Bloomington, US.

“Smoking is a well-established risk factor for bladder cancer, but findings on the relationship between duration of smoking cessation and the reduction in bladder cancer risk are inconsistent,” Li added.

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Published in the journal Cancer Prevention Research, the study found that the steepest reduction in risk occurred in the first 10 years after quitting smoking, with a 25 per cent drop. The risk continued to decrease after 10 years of quitting.

“Our study emphasizes the importance of primary prevention (by not beginning to smoke) and secondary prevention (through smoking cessation) in the prevention of bladder cancer among postmenopausal women,” said Li. (IANS)

Next Story

Prenatal Smoking, Drinking Increases SIDS Risk; Says New Study

According to the researchers, these risks were in comparison to infants who were either not exposed to tobacco or alcohol during gestation or whose mothers quit tobacco or alcohol use by the end of the first trimester

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Effects of smoking
Excessive smoking can increase the chances of looking old as well. Pixabay

Children born to mothers who drank and smoked beyond the first three months of pregnancy have 12-fold increased risk for sudden infant death syndrome (SIDS), says a new study.

SIDS is the sudden, unexplained, death of an infant under one year of age. Many studies have shown that the risk of SIDS is increased by maternal smoking during pregnancy.

Some studies have also found that prenatal alcohol exposure, particularly from heavy drinking during pregnancy, can increase SIDS risk.

The findings, published in the journal The Lancet, provide a look at how SIDS risk is influenced by the timing and amount of prenatal exposure to tobacco and alcohol.

“Our findings suggest that combined exposures to alcohol and tobacco have a synergistic effect on SIDS risk, given that dual exposure was associated with substantially higher risk than either exposure alone,” said said first author Amy J Elliot from Avera Health Centre for Pediatric and Community in US.

For the findings, researchers followed the outcomes of nearly 12,000 pregnancies among women from two residential areas in Cape Town, South Africa; and five sites in the US.

men smoking
A Chinese man smokes in front of a pillar with a no smoking notice on display at a bus station in Beijing. VOA

The study sites were selected for their high rates of prenatal alcohol use and SIDS, and to include populations where the ethnic and socioeconomic disparities in SIDS remains understudied.

The researchers determined one-year outcomes for about 94 per cent of the pregnancies.

They found that 66 infants died during that time, including 28 SIDS deaths and 38 deaths from known causes.

Also Read: Marijuana Associated with Higher Risk of Heart Problems: Study

In addition to the almost 12-fold increased SIDS risk from combined smoking and drinking beyond the first trimester of pregnancy, they determined that the risk of SIDS was increased five-fold in infants whose mothers reported they continued smoking beyond the first trimester, and four-fold in infants whose mothers reported they continued drinking beyond the first trimester.

According to the researchers, these risks were in comparison to infants who were either not exposed to tobacco or alcohol during gestation or whose mothers quit tobacco or alcohol use by the end of the first trimester. (IANS)