Szukana fraza: [Abstract = "The material was statistically elaborated and the significance of difference between them was calculated by using Student's t\-test. The results were compared to the studies from between 2002 and 2003. On the basis of the 15\-year\-long observations \(years 2002\-2017\), it was noted that the average body height of boys aged 10\-14 and of girls aged 13\-15 was increasing in rural areas of the Lubuskie Voivodeship. Changes in body height occurring in pupils aged 7\-18 between 2002 and 2017 indicate that the phenomenon of secular trend is slowing down. Decels in body height among boys were noted at the ages 7, 9, and 18, and among girls at the ages 8, 10, and 17."]

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