Prevalence and determinants of asthma in adult male leather tannery workers in Karachi, Pakistan: A cross sectional study

Table 3 Multiple logistic regression analysis of factors associated with asthma among leather tannery workers, Karachi, Pakistan, August 2003 to March 2004 (n = 620^†††)

^†††The final model included less than 641 subjects due to missing values
^‡‡‡ All variables are mutually adjusted for each other
^§§§ Other ethnicity includes Urdu, Sindhi, Balochi and Brahvi
*** Worker who has at least rarely used gloves during different tanning tasks
^†††† Worker who has never used gloves
^‡‡‡‡ Perceived allergy to at least one of the following substances: food, metals, chemicals, medicine, dusts or animals
^§§§§ The interaction was analyzed by calculating odds ratio relative to a common reference i.e. the duration of work at mean duration of 8 years and non-allergic status

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