Table 2. Univariate analysis of risk factors for respiratory problems of TW and NTW in relation to worksite, section, smoking, duration of service, body mass index, fuel used for cooking and overcrowding.
Table 2. Univariate analysis of risk factors for respiratory problems of TW and NTW in relation to worksite, section, smoking, duration ofservice, body mass index, fuel used for cooking and overcrowding.