[Age of pupils entering elementary school and their health condition as well as their scholastic progress].
D000124:Achievement; D000367:Age Factors; D002648:Child; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D007858:Learning; D008297:Male; D011044:Poland; D012572:School Health Services
Wiek rozpoczecia nauki a stan zdrowia i postepy w nauce uczniów szkoły podstawowej.