To investigate the associations between hemoglobin (Hb) concentration and hematocrit (Hct), and blood pressure (BP) in children and adolescents. The study population consisted of 7950 subjects total (4229 boys and 3721 girls) aged 10–18 years who participated in the Korea National Health and Nutrition Examination Surveys conducted between 2007 and 2017. The prevalence of hypertension was 19.19% (21.51% for boys and 16.5% for girls) among the study population, and the prevalence of obesity was 9.59% (10.5% for boys and 8.6% for girls). Hb count and Hct tended to increase with the degree of obesity and BP elevation. Systolic BP (SBP) and diastolic BP (DBP) positively correlated with Hb count and Hct in both sexes. Following multiple linear regression analysis, Hb count and Hct presented a positive association with SBP and DBP after adjusting for age, BMI SDS, alcohol consumption, smoking status, physical activity, rural residence, household income, diagnosis of T2DM, hypertension, and dyslipidemia. Hb count and Hct were positively associated with SBP and DBP in children and adolescents 10–18 years old.

调查儿童和青少年血红蛋白 (Hb) 浓度与血细胞比容 (Hct) 和血压 (BP) 之间的关联。研究人群包括参加 2007 年至 2017 年间进行的韩国国民健康和营养检查调查的 7950 名年龄在 10-18 岁之间的受试者（4229 名男孩和 3721 名女孩）。高血压患病率为 19.19%（男孩为 21.51%，女孩为 16.5%），肥胖患病率为 9.59%（男孩为 10.5%，女孩为 8.6%）。Hb 计数和 Hct 往往随着肥胖程度和血压升高而增加。收缩压 (SBP) 和舒张压 (DBP) 与两种性别的 Hb 计数和 Hct 呈正相关。经过多元线性回归分析，Hb 计数和 Hct 在调整年龄后与 SBP 和 DBP 呈正相关，BMI SDS、饮酒量、吸烟状况、身体活动、农村居住地、家庭收入、T2DM 诊断、高血压和血脂异常。Hb 计数和 Hct 与 10-18 岁儿童和青少年的 SBP 和 DBP 呈正相关。