engleski

Influence of the incoming solar radiation on the bone mineral density in the female adult population in Croatia

We investigated the link between the bone mineral density (BMD) in Croatian female adults and the average incoming solar radiation at the ground. The study included 387 volunteers of average age of 60 years from three different locations: Pula (n=128, age from 35 to 76), Krapina (n=141, age from 43 to 77), and Zagreb (n=118, age from 32 to 79). Apart from the different lifestyle, each of above locations is characterized by noticeably different incoming solar radiation, where values of 503.3 kJ cm-2, 471.2 kJ cm-2 and 436.3 kJ cm-2 correspond to average annual radiation at the ground for Pula, Krapina and Zagreb, respectively. Heel BMD was measured by clinical bone sonometer (Sahara). On the average the BMD was highest for Pula (0.469 g cm-2) and the lowest for Zagreb (0.433 g cm-2). Similarly, the percentage of normal bones was the highest for Pula (46.1%) and the lowest for Zagreb (32.2%). Osteopenic bones were the most frequent for Zagreb (61.0%), while corresponding figures for Pula and Krapina were 46.9% and 43.6%, respectively. Osteoporosis varied from 6.8% in Zagreb to 11.4% in Krapina. A test of independence by contingency table confirmed at the significance level ?=0.05 that probability of normal bone occurrence increases with the increase of incoming solar radiation.

bone mineral density; solar radiation; sonometer; osteoporosis; osteopenia

nije evidentirano