Osteopenia: Given the patient's T score of -1.2 on the DEXA scan, which indicates bone density is lower than normal but not low enough to be classified as osteoporosis, this is the most likely diagnosis. The recent hip fracture also supports this, as osteopenia increases the risk of fractures.

Osteoporosis: Although the T score is -1.2, which is technically in the osteopenia range, the presence of a hip fracture, which is a common complication of osteoporosis, makes this a plausible diagnosis, especially if the patient has other risk factors for osteoporosis.
Secondary Osteoporosis: This could be considered if there were underlying conditions or medications that could lead to bone loss, but the lab being normal makes this less likely. However, not all secondary causes may be evident from basic lab work.

Malignancy (e.g., Metastatic Bone Disease): Although less common, a hip fracture could be the first presentation of a malignancy, such as metastatic cancer to the bone. This would be particularly concerning if the fracture occurred with minimal trauma.
Osteomalacia: This condition, characterized by softening of the bones due to impaired bone mineralization, could present with fractures. However, it would typically be associated with abnormal lab values, which are not present in this case.

Idiopathic Osteoporosis: This is a rare condition where osteoporosis occurs without an identifiable secondary cause, often at a younger age than typical osteoporosis. Given the patient's age and the presence of a fracture, this is less likely but could be considered if other causes are ruled out.
Genetic Disorders Affecting Bone Density: Conditions like osteogenesis imperfecta are rare and typically present at a younger age, but some forms could potentially lead to fractures in older adults without a clear history of the disease.