Low back pain, pain that is felt in the affected anatomical area with a variety of long occurrence of pain. This pain feels lumbar or lumbo-sacral. Workers of tofu home industry are at risk of low back pain due to their activities such as the position of bending, lifting and carrying heavy loads. This research aim to factors that risk against the incident of low back pain. Total sample of 132 respondents: 66 cases and 66 controls were selected randomly from workers of tofu home industry. Data analysis using Chi Square and logistic regression to know the most dominant factor. There was relationship of employment, back posture, heavy weights with low back pain (P <0.05). There was not relationship age, sex, smoking, body mass index and physical activity with low back pain (p>0.05). Multivariate analysis using logistic regression showed the most dominant working period affecting low back pain. The study found that low back pain was a relevant health problem among workers of tofu home industry. The policy of arranging breaks and lifting techniques is required to prevent low back pain.

Work fatigue is one of health and safety problems which can be risk factor for workplace accidents. There are many factors that cause work fatigue, like age, gender, work load, working period, and carbonmonoxide exposure. The objective of this study was to identity the carbon monoxide exposure in blood and workers characteristic on work fatigue in the fum fish village Penatarsewu Sidoarjo Regency. The research was using cross sectional design with 42 samples. Work fatigue was quantified with reaction timer carbon monoxide effect with measuring COHb level in blood, work load with fingertrip oximeter, and workers characteristic were collected through interview with questionnaires. Study was analyzed with multivariate logistic regression through SPSS. The research shows analysis suggests that age and sex aren’t significantly related to work-related fatigue, while employment period, work load and Carbon Monoxide exposure are significantly related to work-related fatigue. The result of multivariate analysis shows that work load, employment period and Carbon Monoxide exposure are significantly related to work-related fatigue. Work load is the dominant variable for work-related fatigue. Workers having heavy work load are exposed to work-related fatigue 9 times higher compared to those with light work load.