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Chinese Journal of Clinicians(Electronic Edition) ›› 2021, Vol. 15 ›› Issue (03): 164-170. doi: 10.3877/cma.j.issn.1674-0785.2021.03.002

• Clinical Research • Previous Articles     Next Articles

Relationship between serum lipoprotein (a) level and risk and severity of coronary atherosclerotic heart disease in patients with type 2 diabetes mellitus

Junxu Gu1, Yao Xing1, Ming Su1, Mei Jia1, Chunyan Wang1,()   

  1. 1. Department of Laboratory Medicine, Peking University People's Hospital, Beijing 100044, China
  • Received:2021-02-15 Online:2021-03-15 Published:2021-08-06
  • Contact: Chunyan Wang

Abstract:

Objective

To investigate the relationship between lipoprotein (a)[Lp(a)] and the risk and severity of coronary atherosclerotic heart disease (CAHD) in patients with type 2 diabetes mellitus (T2DM).

Methods

From January 2017 to December 2019, 1228 T2DM patients (717 males and 511 females) were treated at Peking University People's Hospital. According to the results of coronary angiography (CAG), they were divided into either a CAHD group or a non-CAHD group. Diabetic patients with CAHD were further divided into a single vessel disease subgroup, double vessel disease subgroup, and multiple vessel disease subgroup according to the number of blocked vessels, or further divided into a low Gensini score (GS) subgroup (GS ≤ 25), medium GS subgroup (GS: 26-40), and high GS subgroup (GS ≥ 41) according to GS. Binary Logistic stepwise regression was used to evaluate the relationship between Lp(a) and the risk and severity of CAHD.

Results

Serum Lp(a) level in the CAHD group was significantly higher than that of the non-CAHD group [39.82 (48.06) nmol/L vs 38.27 (33.64) nmol/L, Z=-2.595, P=0.006], and the level of Lp(a) in patients with multi-vessel disease was significantly increased compared with those with single or double vessel disease [32.81 (40.73) nmol/L vs 39.47 (45.54) nmol/L and 43.51 (49.94) nmol/L, H=18.440, P<0.001]. The level of serum Lp(a) in patients with high GS was significantly higher than those of the other two subgroups [33.74 (40.75) nmol/L vs 39.57 (45.63) nmol/L and 46.21 (52.75) nmol/L, H=20.548, P<0.001]. According to Mantel-Haenszel linear trend test analysis, with the increase of serum Lp(a) level, the degree of coronary artery occlusion increased (P<0.001). Logistic regression analysis showed that Lp(a) level was still independently associated with the risk and severity of CAHD [CAHD group vs non-CAHD group: odds ratio (OR)=2.207, 95% confidence interval (CI): 1.790-5.060, P=0.026; multi-vessel subgroup vs single vessel subgroup: OR=3.288, 95%CI: 1.871-7.278, P=0.035; high GS group vs low GS group: OR=2.556, 95%CI: 2.046-5.378, P=0.023].

Conclusion

In T2DM patients, elevated Lp(a) is an independent risk factor for CAHD and is associated with the severity of CAHD.

Key words: Lipoprotein (a), Coronary atherosclerotic heart disease, Type 2 diabetes mellitus

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