Drinking hot tea linked to cancer

A new study  for the China Kadoorie Biobank Collaborative Group has found a link between drinking high temperature tea and esophageal cancer.

The population-based cohort study took place across 10 places in China.  The objective was t0 examine whether high-temperature tea drinking, along with the established risk factors of alcohol consumption and smoking, is associated with esophageal cancer risk.

The link has been a suggestion before the attempt was to establish the link.

There were 456 155 participants aged 30 to 79 years. Those who had cancer at baseline or who reduced consumption of tea, alcohol, or tobacco before baseline were excluded.

The usual temperature at which tea was consumed, other tea consumption metrics, and lifestyle behaviors were self-reported once, at baseline. Outcome was esophageal cancer incidence up to 2015.

Over 9.2 years, 731 incident esophageal cancer cases were documented. A higher risk was found when high temperature drinking was combined with alcohol and tobacco than when high temperature was consumed alone.

The study said:

Compared with participants who drank tea less than weekly and consumed fewer than 15 g of alcohol daily, those who drank burning-hot tea and 15 g or more of alcohol daily had the greatest risk for esophageal cancer (hazard ratio [HR], 5.00 [95% CI, 3.64 to 6.88]). Likewise, the HR for current smokers who drank burning-hot tea daily was 2.03 (CI, 1.55 to 2.67).

The study can be read in full here

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