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Tinnitus belongs to seriously debilitating auditory conditions and is often complicated by comorbidities such as insomnia, difficulties with concentration, depression, frustration and irritability. To facilitate the grading of symptoms and the effects of therapeutic strategies, we validated a German-version Tinnitus Functional Index (TFI) in 229 subjects suffering from chronic tinnitus. Outcome validity was assessed using the Tinnitus Questionnaire (TQ, German adaptation by Goebel u. Hiller [1998]). Construct validity was assessed using the "Hamburger Allgemeine Depressionsskala" (HADS). The German TFI featured excellent internal consistency (total score Cronbach's α=0.93). Factor analysis disclosed eight TFI subscales as proposed earlier by Meikle et al. [2012]. Intercorrelations were strong both between the TFI and the TQ (r=0.83), and between the TFI and the HADS (depression r=0.49, anxiety r=0.51). The German-version TFI qualifies as a rapid and statistically robust tool for grading the impact of tinnitus on daily living and for the measurements of therapeutic effects. Regarding depressive symptomatology, sensitivity of the TFI was comparable to that of the TQ.

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Informal vendors are a critical source of food security for urban residents in African cities. However, the livelihoods of these traders and the governance constraints they encounter are not well-understood outside of the region's capital and primate cities. This study focuses on two distinct secondary cities in Nigeria, Calabar in the South-South geopolitical zone of the country and Minna in the Middle Belt region. Local and state officials in each city were interviewed on the legal, institutional, and oversight functions they provide within the informal food sector. This was complemented with a survey of 1,097 traders across the two cities to assess their demographic characteristics, contributions to local food security, key challenges they face for profitability, engagement with government actors, and degree of access to services in the markets. The analysis highlights two main findings. First, informal traders report less harassment by government actors than has been observed in larger Nigerian cities. At the same time, however, the enabling environment is characterized by benign neglect whereby government-mandated oversight functions are not comprehensively implemented and service delivery gaps remain a major hindrance to food safety. Second, there are important differences in the needs of traders across cities, suggesting that policies focused on food safety and improving the livelihoods of this constituency more broadly need to be properly nuanced even at the subnational level.

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