Ravisankar P, Udupa Kaviraja, Prakash E Sankaranarayanan
Department of Physiology, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Pondicherry--605 006.
Indian J Physiol Pharmacol. 2005 Oct-Dec;49(4):455-61.
In the present study, we investigated the correlation between body mass index (BMI), blood pressure (BP) indices and indices of physical fitness in apparently healthy subjects aged 14-18 years. We obtained data from 145 (105 males and 40 females) and assessed the correlation between BMI, and heart rate, systolic pressure (SP), diastolic pressure (DP), pulse pressure (PP), mean arterial pressure (MP), rate-pressure product, endurance in the 40 mm Hg test, handgrip strength (HGS), and handgrip endurance. Subjects with BMI <18.5 kg/m2, 18.5-25 kg/m2 and >25 kg/m2 were classed as underweight (65 males and 9 females), normal weight (27 males and 20 females), and overweight (13 males and 11 females) respectively. In view of gender differences in autonomic regulation, data of male and female subjects were analyzed separately. We used analysis of variance to compare differences between the three groups. Correlation between BMI and other indices was tested using Pearson's correlation coefficient. A P value <0.05 was considered statistically significant Both SP and DP were highest in overweight and least in underweight male subjects (P<0.05 for both), whereas in females, differences in DP alone were statistically significant (P<0.05). In underweight male subjects, there was a positive correlation between BMI and SP, DP, PP, MP and HGS (P<0.05 for all). There was a positive correlation between BMI and SP in overweight male subjects (r = 0.5 P = 0.07, n = 13). A positive correlation was observed between BMI and rate-pressure product (r = 0.5, P = 0.45, n = 11) and BMI and HGS (r = 0.6, P = 0.05, n = 11) in overweight females. Our observations indicate that there are gender differences in the correlation between BMI and BP indices especially in underweight and overweight subjects. The observed differences between the three groups and gender differences in correlation between BMI and BP indices may be due to differences in autonomic function and or energy metabolism.
在本研究中，我们调查了14至18岁表面健康受试者的体重指数（BMI）、血压（BP）指标与体能指标之间的相关性。我们收集了145名受试者（105名男性和40名女性）的数据，并评估了BMI与心率、收缩压（SP）、舒张压（DP）、脉压（PP）、平均动脉压（MP）、率压乘积、40毫米汞柱试验耐力、握力（HGS）和握力耐力之间的相关性。BMI<18.5千克/平方米、18.5 - 25千克/平方米和>25千克/平方米的受试者分别被归类为体重过轻（65名男性和9名女性）、正常体重（27名男性和20名女性）和超重（13名男性和11名女性）。鉴于自主调节存在性别差异，对男性和女性受试者的数据分别进行了分析。我们使用方差分析来比较三组之间的差异。使用Pearson相关系数检验BMI与其他指标之间的相关性。P值<0.05被认为具有统计学意义。超重男性受试者的SP和DP最高，体重过轻男性受试者的最低（两者P均<0.05），而在女性中，仅DP的差异具有统计学意义（P<0.05）。在体重过轻的男性受试者中，BMI与SP、DP、PP、MP和HGS之间存在正相关（所有P均<0.05）。超重男性受试者中，BMI与SP之间存在正相关（r = 0.5，P = 0.07，n = 13）。超重女性中，观察到BMI与率压乘积之间存在正相关（r = 0.5，P = 0.45，n = 11）以及BMI与HGS之间存在正相关（r = 0.6，P = 0.05，n = 11）。我们的观察结果表明，BMI与BP指标之间的相关性存在性别差异，尤其是在体重过轻和超重的受试者中。三组之间观察到的差异以及BMI与BP指标之间相关性的性别差异可能归因于自主功能和/或能量代谢的差异。
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