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Table 5 The association between regular recreational physical activity and risk of head and neck cancer stratified by the use of alcohol, betel quid, or cigarette

From: Regular recreational physical activity and risk of head and neck cancer

  No regular recreational physical activity vs. regular recreational physical activity OR (95% CI)a
Alcohol drinking
 Never + occasional 0.97 (0.63–1.49)
 Former regular 1.34 (0.59–3.04)
 Current regular 0.99 (0.64–1.53)
 Former regular + current regular 1.05 (0.72–1.52)
  P-interaction =0.83
Betel quid
 Never 0.95 (0.63–1.43)
 Former 0.79 (0.49–1.28)
 Current 1.96 (0.91–4.21)
 Former + Current 1.04 (0.70–1.53)
  P-interaction =0.75
Cigarette
 Never 1.59 (0.81–3.10)
 Former 0.73 (0.40–1.33)
 Current 0.96 (0.66–1.40)
 Former + Current 0.92 (0.67–1.25)
  P-interaction =0.61
  1. Abbreviations: CI confidence interval, OR odds ratio
  2. aOR and 95% CI were calculated using unconditional logistic regression, adjusted for sex, age, education, cigarette smoking (pack-year categories), betel quid chewing (pack-year categories), alcohol drinking (frequency), and intake of vegetables and fruits
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