context: In recent years the characteristic that has strongly correlated with health in developed countries is income inequality. Creating an index of "Health and Social Problems" from nine factors, authors Richard Wilkinson and Kate Pickett found health and social problems "more common in countries with bigger income inequalities", and more common among states in the US with larger income inequalities. Other studies have confirmed this relationship. The UNICEF index of "child well-being in rich countries", studying 40 indicators in 22 countries, correlates with greater equality but not per capita income.
question: সাম্প্রতিক বছরগুলোতে উন্নত দেশগুলোতে স্বাস্থ্যের সঙ্গে দৃঢ়ভাবে সম্পর্কযুক্ত কোন বৈশিষ্ট্যটা রয়েছে?
answers: income inequality income inequality income inequality