Why Is Milk Consumption Associated With Hip Fractures?

Milk consumption during teenage years was not associated with a lower risk of hip fracture. If anything, milk consumption was associated with a borderline increase in fracture risk in men. It appears that the extra boost in total body bone mineral density you get from getting extra calcium is lost within a few years. This suggests a partial explanation for the long-standing enigma that hip fracture rates are highest in populations with the greatest milk consumption. Maybe an explanation why they're not lower, but why would they be higher?