مؤشر كتلة الجسم (BMI)
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التعريف
مقياس للفحص يُحسب بقسمة وزن الشخص بالكيلوغرام على مربع طوله بالمتر (كغ/م²).
الشرح
Developed by Belgian statistician Adolphe Quetelet around 1832, BMI was intended as a population-level statistical tool, not an individual diagnostic. The WHO defines underweight as BMI below 18.5, normal weight as 18.5–24.9, overweight as 25–29.9, and obese as 30 and above. BMI does not distinguish muscle from fat and has been criticized for systematically misclassifying athletes and underestimating health risks in some ethnic groups.
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RELATED TERMS
وحدات ضغط الدم
يُقاس ضغط الدم بالملليمتر زئبقي (mmHg)، ويُعبَّر عنه بقيمتين: الضغط الانقباضي (عند انقباض القلب) فوق الضغط الانبساطي (عند ارتخاء القلب)، مثل 120/80 mmHg.
أرقام قياس الإطار
يُرمز لقياس الإطار بصيغة العرض/نسبة_الجانب R القطر (مثل 205/55 R16)، حيث العرض بالملليمتر، ونسبة الجانب هي ارتفاع الجدار الجانبي كنسبة مئوية من العرض، والقطر هو حجم حافة العجلة بالبوصة.