Low diastolic blood pressure and adverse outcomes in inpatients with acute exacerbation of chronic obstructive pulmonary disease: A multicenter cohort study

Background:Although intensively studied in patients with cardiovascular diseases(CVDs),the prognostic value of diastolic blood pressure(DBP)has little been elucidated in patients with acute exacerbation of chronic obstructive pulmonary disease(AECOPD).This study aimed to reveal the prognostic value of DBP in AECOPD patients.Methods:Inpatients with AECOPD were prospectively enrolled from 10 medical centers in China between September 2017 and July 2021.DBP was measured on admission.The primary outcome was all-cause in-hospital mortality;invasive mechanical ventilation and intensive care unit(ICU)admission were secondary outcomes.Least absolute shrinkage and selection operator(LASSO)and multivariable Cox regressions were used to identify independent prognostic factors and calculate the hazard ratio(HR)and 95%confidence interval(CI)for adverse outcomes.Results:Among 13,633 included patients with AECOPD,197(1.45%)died during their hospital stay.Multivariable Cox regression analysis showed that low DBP on admission(<70 mmHg)was associated with increased risk of in-hospital mortality(HR=2.16,95%CI:1.53–3.05,Z=4.37,P<0.01),invasive mechanical ventilation(HR=1.65,95%CI:1.32–2.05,Z=19.67,P<0.01),and ICU admission(HR=1.45,95%CI:1.24–1.69,Z=22.08,P<0.01)in the overall cohort.Similar findings were observed in subgroups with or without CVDs,except for invasive mechanical ventilation in the subgroup with CVDs.When DBP was further categorized in 5-mmHg increments from<50 mmHg to≥100 mmHg,and 75 to<80 mmHg was taken as reference,HRs for in-hospital mortality increased almost linearly with decreased DBP in the overall cohort and subgroups of patients with CVDs;higher DBP was not associated with the risk of in-hospital mortality.Conclusion:Low on-admission DBP,particularly<70 mmHg,was associated with an increased risk of adverse outcomes among inpatients with AECOPD,with or without CVDs,which may serve as a convenient predictor of poor prognosis in these patients.Clinical Trial Registration:Chinese Clinical Trail Registry,No.ChiCTR2100044625.

中国城镇儿童不同Tanner分期身高体重现况调查

目的了解我国城镇3~18岁儿童不同Tanner分期身高、体重的情况,为建立各青春发育期身高、体重的标准化参照值提供依据。方法于2017年1月至2019年12月应用分层随机整群抽样的方法,对中国12个省、自治区、直辖市218185名健康儿童体格发育情况进行横断面调查。调查指标包括体重、身高、腰围、臀围和第二性征。采用基于GAMLSS软件构建各年龄组男、女童的身高、体重百分位数参照值及生长曲线,采用Wilcoxon秩和检验比较各Tanner分期儿童与同年龄同性别不分发育分期组所有儿童的身高、体重第50百分位值。结果绘制出3~18岁儿童男、女各自年龄的身高、体重第3、50、97百分位曲线。绘制出儿童男、女各青春发育期年龄的身高、体重第3、50、97百分位曲线。9岁及以上Tanner 1期男童和7岁及以上Tanner 1期女童身高及体重低于同年龄同性别所有儿童(均P<0.01),男女童身高差值范围分别为-4.0~-0.6、-4.4~-0.5 cm,体重差值范围分别为-4.8~-0.4、-4.0~-0.3 kg。Tanner 2期与3期儿童年龄的身高及年龄的体重呈先高后低趋势,两组曲线呈交叉走势。16岁及以下Tanner 4期男童和14岁以下Tanner 4期女童年龄的身高、体重高于同龄同性别所有儿童(均P<0.01),身高差值范围男女童分别为0.2~10.0、0.2~9.4 cm,体重差值范围分别为0.7~10.9、1.0~11.2 g,曲线各年龄组两组间差异随年龄逐渐缩小。结论建立了我国城镇3~18岁不同性别儿童各青春发育期年龄的身高、体重百分位曲线,可供临床进行青春期体格发育评估使用。