Ƙananan tsayi yana rage haɗarin rashin ƙarfi na venous.Lokacin da jama'a ke raba asalin kwayoyin halitta da abubuwan muhalli, matsakaicin tsayi yana da halaye a cikin rukuni. Bambancin tsayi na musamman (kimanin kashi 20% na karkacewa daga matsakaici) a cikin irin wannan jama'a wani lokacin yana faruwa ne saboda gigantism ko dwarfism, wanda ke da takamaiman kwayoyin halitta ko yanayin rashin lafiyar endocrine.Tasirin likita na ɗan adam na iya zama babban mai nuna alamun rashin lafiyar abinci mai gina jiki guda biyu, wato ingancin abinci mai gina jiki da ƙarancin yiwuwar kamuwa da cutar kansa.Bincike na likitancin Burtaniya ya nuna cewa wannan yanayin yana haifar da raguwar rashin cin abinci mai gina jiki a cikin maza fiye da maza, yayin da ba a cikin ƙarancin shekarun haihuwa ko na balaga ba. A cikin bincike na likitanci na ƙarni na 20 ya nuna cewa wannan yanayin yana haifar da raguwar rashin cin abinci mai gina jiki a cikin maza, yayin da ba a cikin mata ba. A cikin yara da ba a cikin manya ba, bincike na likitanci ya nuna
gigantism ko dwarfism