Background
The relationship between birth weight and blood pressure has not been well explored in Chinese children and adolescents. The aim of this study was to investigate the relationship between birth weight and childhood blood pressure in China.
Methods
A total of 15324 children and adolescents (7919 boys and 7405 girls) aged 7–17 years were stratified into six birth weight groups. Analysis of covariance and binary logistic regression were used to analyse the relationship between birth weight and blood pressure while controlling for potential confounding factors, including age, gestational age, season of birth and area of residence.
Results
The group with birth weights from 2500 to 2999 g had the lowest prevalence of hypertension (8.9%). Lower birth weight children (< 2000 g) had significantly higher systolic blood pressure (SBP) (106.00 ± 0.72,
P
= 0.017), and children with heavier birth weights also had higher SBP (3500–3999 g, 105.13 ± 0.17,
P <
.001; ≥ 4000 g, 105.96 ± 0.27,
P <
.001). No significant relationship was found between birth weight and diastolic blood pressure (DBP). The overall rate of hypertension was 10.8% (12.1% in boys and 9.4% in girls). The median weight group (2500–2999 g) had the lowest rate of hypertension (8.9%). Compared with children in the median weight group, children with lower birth weight had a higher prevalence of hypertension (< 2000 g, OR = 1.85, 95% CI = 1.25–2.74; 2000–2499 g, OR = 1.57, 95% CI = 1.15–2.13), and groups with higher birth weights also had higher risks of hypertension (3500–3999 g, OR = 1.22, 95% CI = 1.02–1.45; ≥ 4000 g, OR = 1.42, 95% CI = 1.16–1.74).
Conclusions
Excluding the confounding effect of obesity, a U-shaped relationship between birth weight and risk of hypertension was found in children and adolescents in Chinese cities. Birth weight significantly influences SBP but has a minimal effect on DBP. Further basic research on foetal development and programming may shed light on this phenomenon.
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Background: Traditional blood lipids play an important role in diabetes and cardiovascular diseases, but the evidences were not enough . The lipoprotein indices of low-density lipoprotein cholesterol (LDL-C) and triglyceride (TG) to high-density lipoprotein cholesterol (HDL-C) ratios may be the predictive parameters to diabetes and cardiovascular disease. Methods: A 6-year follow-up study was performed in 22,649 subjects (were aged 18–95 years old) without a history of cardiovascular disease (CVD) or diabetes. The information about cardiovascular disease and T2DM was extracted from the Disease Surveillance Points (DSP) system in 2019. Biochemical and demographic variables were acquired by laboratory test and the face-to-face interview with structured questionnaire, the response rate was 88.9%. Lipid ratios were stratified by tertile to ascertain the hazard ratio (HR) of diseases by Cox proportional hazard model. Results: The mean age of subjects was 54.9(14.5) years, 41.9% were males. LDL-C /HDL-C was strongly associated with coronary heart disease (CHD) ( second vs. first tertile: HR, 1.86; 95% CI, 1.03-3.37, p =0.04 ; third vs. first tertile: HR, 3.29; 95% CI, 1.91-5.69, p< 0.001), meanwhile the TG/HDL-C was specifically associated with type 2 diabetes mellitus (T2DM) (second vs. first tertile: HR, 1.56; 95% CI, 1.2-2.02, p =0.001; third vs. first tertile: HR, 2.7; 95% CI, 2.13-3.43, p< 0.001). Moreover, the HR, of diseases was increased with LDL-C, TG/HDL-C ratios. The results of sensitivity analysis revealed the associations of LDL-C, TG/HDL-C ratios with CHD and T2DM were independent on confounders. Conclusion: Our findings suggested that the LDL-C/HDL-C ratio and TG/HDL-C ratio associated with CHD and T2DM , and hazard ratio of disease increased with lipoprotein derived indices.
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