Interestingly, PTH levels below 30.5 pg/mL (3.23 pmol/L) at 10 min post-surgery had the highest positive likelihood ratio to identify patients at risk for symptomatic Hypocalcemia (LR+ 9.76), while the ratio of 4-h PTH to pre-surgery PTH displayed the second-best positive likelihood ratio (LR+ 8.70). The gene discussed is PTH; the disease is Hypocalcemia.