Preoperative PTH levels demonstrated a small but statistically significant association with HBS development (OR 1.002 per pg/mL increase, 95% CI 1.001–1.003, p = 0.031), while osteoporosis showed a positive but non-significant trend (OR 2.05, 95% CI 0.80–5.26, p = 0.271). Here, PTH is linked to osteoporosis.