Table 4 Associated risk factors in a multivariate model in men

From: Cannabis, tobacco and domestic fumes intake are associated with nasopharyngeal carcinoma in North Africa

Exposures

OR (95%CI)

P -value

Rancid butter (Adulthood)

 

0.001

 <10 times per year (ref.)

1

 

 <3 times per week

1.44 (0.93–2.23)

 

 ⩾3 times per week

3.52 (1.71–7.23)

 

Rancid sheep fat (Adulthood)

 

0.004

 <10 times per year (ref.)

1

 

 <3 times per week

2.08 (1.33–3.26)

 

 ⩾3 times per week

1.70 (0.85–7.23)

 

Cooked vegetables (Adulthood)

 

0.004

 <3 times per week (ref.)

1

 

 ⩾3 times per week

0.54 (0.36–0.82)

 

Kitchen ventilation (Childhood)

 

0.02

 Ventilated (ref.)

1

 

 Not ventilated

1.64 (1.09–2.48)

 

Lifetime cannabis consumption

 

0.007

 Never (ref.)

1

 

 <2000 times

2.00 (0.85–4.70)

 

 ⩾2000 times

3.25 (1.24–8.50)

 
  1. Abbreviations: CI=confidence interval; NPC=nasopharyngeal carcinoma; OR=odds ratio.
  2. Note: Analyses were stratified by sex and centre, adjusted for age and SES, with female samples excluded. Stepwise inclusion method was used, with inclusion criteria of P<0.05. When there are more than two exposure levels, P-values correspond to trend test.
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