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What kind of survey is it? The Estonian Health Interview Survey assesses the health status of the Estonian population, the factors influencing it, and the use of health services. The 2025 survey consists of two parts: the core survey, which is part of the fourth wave of the European Union Health Interview Survey and part of the official statistical programme; 18 additional voluntary questions that specify Estonia's needs in shaping health policy. More detailed information is available here: https://www.tai.ee/et/teadustoo/teadustoo-ulevaade/seireuuringud/eesti-terviseuuring/eesti-terviseuuring

Research and development (R&D) aim at acquiring new knowledge or using existing knowledge in a novel way. For example, it is the improvement of a product or work process. R&D ends when the main product is developed and the focus is shifted to production planning or market expansion. The main features of R&D are novelty, creativity, ambiguity, systematicity and transferability. Novelty means discovering something new, and with that goal in mind, researchers carry out studies at universities and research institutes. In business, novelty refers to new discoveries or technologies that have not