diff --git a/timescaledb/composite_queries.py b/timescaledb/composite_queries.py
index a102f48..907be83 100644
--- a/timescaledb/composite_queries.py
+++ b/timescaledb/composite_queries.py
@@ -591,14 +591,9 @@ class CompositeQueries:
                 results.append(
                     {
                         "link_id": link_id,
-                        "diameter": diameters[i],
-                        "velocity": velocities[i],
-                        "pressure": pressures[i],
                         "survival_function": {
                             "x": sf.x.tolist(),  # 时间点（年）
                             "y": sf.y.tolist(),  # 生存概率
-                            "a": float(sf.a),
-                            "b": float(sf.b),
                         },
                     }
                 )