Correlation between lipoprotein-associated phospholipase A2 level and cardiovascular disease in patients with obstructivesleep apnea syndrome
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摘要:目的
观察阻塞性睡眠呼吸暂停综合征(OSAS)患者外周血中脂蛋白相关磷脂酶A2(Lp-PLA2)水平, 探讨Lp-PLA2可否作为患者并发心血管疾病(CVD)的有效预测指标。
方法选取238例疑似OSAS的患者为研究对象,根据呼吸暂停低通气指数(AHI)分为非OSAS组53例和OSAS组185例(轻度42例,中度68例,重度75例),其中OSAS患者并发CVD 74例。采用酶联免疫吸附实验(ELISA)测定外周血Lp-PLA2水平,并分析其与OSAS患者并发CVD的关系。
结果合并CVD的OSAS患者年龄、AHI、氧减饱和度指数(ODI)、Lp-PLA2均高于不合并CVD的OSAS患者,差异有统计学意义(P < 0.05)。在轻度、中度、重度OSAS患者中,合并CVD患者的Lp-PLA2水平高于不合并CVD患者,差异有统计学意义(P < 0.05)。Lp-PLA2预测OSAS患者并发CVD的受试者工作特征(ROC)曲线的曲线下面积为0.804(0.740~0.859, P < 0.001), 截断值为235.1 ng/mL。多因素Logistic回归分析结果显示, AHI(OR=1.044, 95%CI: 1.025~1.063, P < 0.001)、ODI(OR=1.035, 95%CI: 1.020~1.050, P < 0.001)、Lp-PLA2(OR=2.700, 95%CI: 1.412~5.164, P=0.003)及高血压(OR=2.648, 95%CI: 1.384~5.067, P=0.003)是OSAS患者并发CVD的独立影响因素。
结论Lp-PLA2可作为OSAS患者并发CVD的有效预测指标, Lp-PLA2>235.1 ng/mL提示患者并发CVD的风险较高。
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关键词:
- 脂蛋白相关磷脂酶A2 /
- 阻塞性睡眠呼吸暂停综合征 /
- 心血管疾病 /
- 危险因素
Abstract:ObjectiveTo observe the level of lipoprotein-associated phospholipase A2 (Lp-PLA2) in peripheral blood of patients with obstructive sleep apnea syndrome (OSAS), and to explore whether Lp-PLA2 can be an effective predictor for patients with cardiovascular disease (CVD).
MethodsA total of 238 patients with suspected OSAS were selected as the research objects. According to the apnea hypopnea index (AHI), they were divided into non-OSAS group (n=53) and OSAS group (n=185) 42 mild cases, 68 moderate cases, and 75 severe cases). Among them, 74 patients with OSAS were complicated with CVD. The level of Lp-PLA2 in peripheral blood was determined by enzyme-linked immunosorbent assay (ELISA), and its relationship with CVD in patients with OSAS was analyzed.
ResultsThe age, AHI, oxygen desaturation index (ODI), Lp-PLA2 of OSAS patients with CVD were significantly higher than those of OSAS patients without CVD(P < 0.05). Among patients with mild, moderate and severe OSAS, the Lp-PLA2 level in patients with CVD was significantly higher than that in in patients without CVD (P < 0.05). The area under receiver operating characteristic (ROC) curve of Lp-PLA2 for predicting CVD in OSAS patients was 0.804 (0.740 to 0.859, P < 0.001), and the cut-off value was 235.1 ng/mL. Multivariate Logistic regression analysis showed that AHI (OR=1.044, 95%CI, 1.025 to 1.063, P < 0.001), ODI (OR=1.035, 95%CI, 1.020 to 1.050, P < 0.001), Lp-PLA2 (OR=2.700, 95%CI, 1.412 to 5.164, P=0.003) and hypertension (OR=2.648, 95%CI, 1.384 to 5.067, P=0.003) were independent influencing factors for CVD in OSAS patients.
ConclusionLp-PLA2 can be used as an effective predictor of OSAS patients complicated with CVD. Lp-PLA2>235.1 ng/mL indicates that patients have a higher risk of complicating CVD.
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表 1 各组基线资料比较(x±s)[n(%)][M(P25, P75)]
基线资料 非OSAS组(n=53) 轻度OSAS组(n=42) 中度OSAS组(n=68) 重度OSAS组(n=75) F/H/χ2 P 人口特征 年龄/岁 51.1±7.2 50.6±6.6 52.5±5.6 53.4±6.7 2.149 0.095 男 37(69.8) 30(71.4) 50(73.5) 60(80.0) 2.041 0.564 体质量指数/(kg/m2) 27.1±2.0 27.1±2.2 27.6±2.4 28.0±2.1 2.266 0.082 既往史 吸烟史 11(20.8) 11(26.2) 14(20.6) 29(38.7) 7.594 0.055 高血压 17(32.1) 14(33.3) 30(44.1) 51(68.0) 21.390 < 0.001 糖尿病 11(20.8) 7(16.7) 16(23.5) 23(30.7) 3.385 0.336 高脂血症 10(18.9) 10(23.8) 16(23.5) 23(30.7) 2.466 0.482 CVD 10(18.9) 12(28.6) 26(38.2) 36(48.0) 12.652 0.005 PSG参数 AHI/(次/h) 2.3±1.4 9.2±3.2 22.1±4.1 49.6±12.1 521.800 < 0.001 ODI/(次/h) 2.6±1.7 8.0±3.3 20.2±10.6 50.3±20.3 176.951 < 0.001 最低SaO2/% 91.8±3.5 84.2±5.2 78.9±8.1 71.9±9.3 80.443 < 0.001 平均SaO2/% 96.2±1.5 94.8±2.8 93.3±3.3 91.9±4.1 20.297 < 0.001 TS90/% 0(0, 1.5) 3.1(0, 8.2) 16.4(1.5, 41.8) 21.2(3.9, 59.8) 109.707 < 0.001 实验室指标 Lp-PLA2/(ng/mL) 175.2±37.1 179.4±44.1 206.1±51.1 227.7±47.9 17.329 < 0.001 甘油三酯/(mmol/L) 1.7±0.6 1.7±0.6 1.8±0.6 2.2±1.2 6.120 0.001 总胆固醇/(mmol/L) 3.8±1.0 4.2±1.5 4.3±1.2 4.5±1.1 4.082 0.008 HDL-C/(mmol/L) 1.1±0.1 1.1±0.1 1.1±0.2 1.0±0.2 6.203 < 0.001 LDL-C/(mmol/L) 2.1±0.8 2.3±1.0 2.4±0.6 2.6±0.7 4.456 0.005 CVD: 心血管疾病; PSG: 多导睡眠监测; AHI: 呼吸暂停低通气指数; ODI: 氧减饱和度指数; SaO2: 动脉血氧饱和度; TS90%: 血氧饱和度 < 90% 的时间占监测总时间的百分比; Lp-PLA2: 脂蛋白相关磷脂酶A2; LDL-C: 低密度脂蛋白胆固醇; HDL-C: 高密度脂蛋白胆固醇。 表 2 合并CVD与不合并CVD的OSAS患者人口特征、PSG及实验室指标比较(x±s)[n(%)][M(P25, P75)]
指标 OSAS合并CVD(n=74) OSAS不合并CVD(n=111) t/Z/χ2 P 人口特征 年龄/岁 54.4±6.6 51.2±5.9 3.346 0.001 男 58(78.4) 82(73.9) 0.513 0.474 体质量指数/(kg/m2) 27.9±2.2 27.4±2.3 1.481 0.140 PSG参数 AHI/(次/h) 34.4±19.2 27.9±17.9 2.338 0.020 ODI/(次/h) 34.8±26.3 26.5±19.9 2.288 0.024 最低SaO2/% 76.2±10.2 77.9±8.9 -1.154 0.251 平均SaO2/% 92.6±4.4 93.4±3.2 -1.378 0.171 TS90/% 14.9(2.3, 50.5) 9.6(1.6, 37.8) -0.033 0.974 实验室指标 Lp-PLA2/(ng/mL) 224.7±51.4 199.1±49.3 3.374 0.001 甘油三酯/(mmol/L) 2.0±1.0 1.9±0.9 0.730 0.467 总胆固醇/(mmol/L) 4.4±1.1 4.3±1.3 0.726 0.469 HDL-C/(mmol/L) 1.1±0.2 1.0±0.2 1.372 0.172 LDL-C/(mmol/L) 2.4±0.8 2.6±0.7 -1.606 0.110 PSG: 多导睡眠监测; AHI: 呼吸暂停低通气指数; ODI: 氧减饱和度指数; SaO2: 动脉血氧饱和度; TS90%: 血氧饱和度 < 90% 的时间占监测总时间的百分比; Lp-PLA2: 脂蛋白相关磷脂酶A2; LDL-C: 低密度脂蛋白胆固醇; HDL-C: 高密度脂蛋白胆固醇。 表 3 变量赋值方法
变量 赋值 年龄/岁 直接纳入 AHI/(次/h) 直接纳入 ODI/(次/h) 直接纳入 Lp-PLA2/(ng/mL) ≤235.1=0,>235.1 =1 吸烟史 否=0, 是=1 高血压 否=0, 是=1 糖尿病 否=0, 是=1 高脂血症 否=0, 是=1 AHI: 呼吸暂停低通气指数; ODI: 氧减饱和度指数;
Lp-PLA2: 脂蛋白相关磷脂酶A2。表 4 OSAS患者并发CVD的多因素Logistic回归分析
变量 β Wald χ2 OR 95%CI P 年龄 0.036 2.215 1.037 0.989~1.087 0.137 AHI 0.043 22.214 1.044 1.025~1.063 < 0.001 ODI 0.035 22.246 1.035 1.020~1.050 < 0.001 Lp-PLA2 0.993 9.014 2.700 1.412~5.164 0.003 吸烟史 0.340 1.166 1.405 0.758~2.607 0.280 高血压 0.974 8.651 2.648 1.384~5.067 0.003 糖尿病 0.365 1.265 1.441 0.762~2.724 0.261 高脂血症 0.591 3.373 1.806 0.961~3.396 0.066 -
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