Final answer:
Bone density generally peaks in the thirties for both males and females, and declines more rapidly in females after menopause. Dexa scans should be ordered for female patients around the age of 50 or shortly after. For male patients, the age to begin ordering dexa scans is not specified, but they can also develop osteoporosis.
Step-by-step explanation:
According to the graph in Figure 6.23, bone density generally peaks in both males and females when they are in their thirties. After that, it starts to decrease, and this decline happens more rapidly in females, especially after menopause. Menopause typically occurs around the age of 50, so it is recommended to begin ordering dexa scans for female patients around this age or shortly after. For male patients, the age to begin ordering dexa scans is not clearly specified in the provided information, but they can also develop osteoporosis. It is generally recommended to consider dexa scans for males who have a family history of osteoporosis or other risk factors.