Preventive medicine is an applied discipline of medicine, which aims at protecting, promoting and maintaining health and preventing disease, disability and premature death. Learning and mastering its basic concepts, basic knowledge and basic skills plays an important role in the medical and health recruitment examination. Now for some important knowledge points, summarize the following formulas to help you remember them easily and master them successfully:
1. Evaluation index of diagnostic test
(1) authenticity: ① sensitivity? ② specificity? ③ False negative rate? ④ False positive rate? ⑤ Likelihood ratio? ⑥ Correct diagnostic indicators
(2) Reliability: ① Coefficient of variation? ② coincidence rate? ③ Consistency analysis of diagnostic test
(3) Revenue: ① Forward forecast value? ② Negative predictive value (with high sensitivity, negative predictive value is helpful to judge non-patients).
Formula:
The concept of authenticity and reliability of income (income)
Authenticity: true (true positive rate) true (true negative rate) false (false positive rate) false (false negative rate), plausible (likelihood ratio) is (right or wrong? Correct diagnostic index)
Reliability: sum of variables (coefficient of variation) (coincidence rate)-1 (consistency analysis)
Revenue: yin-yang forecast (negative forecast value, positive forecast value)
2. Types of essential amino acids for human body
There are nine kinds of essential amino acids: (1) isoleucine (2) leucine (3) lysine (4) methionine (5) phenylalanine (6) threonine (7) tryptophan (8) valine (9) histidine (unique to children).
Formula:
Stupid (phenylalanine) eggs (methionine) come (lysine), dull (threonine), dry (leucine) and dry (isoleucine) shoes (valine)
3. Balanced Diet Pagoda
Formula:
Sweet potato: half a catty and eight liang (250g? 300 grams)
An egg: 40? 50 grams
A spoonful of salt: 6 grams
A bag of milk: 300 grams
A bag of daily nuts: 25-30g.
8 glasses of water: 200? 8= 1600ml, more men than women, 1500? 1700ml
Activity: Walking (6000 steps)
The above is a summary of some knowledge points.