Geriatric Nutritional Risk Index GNRI

The core function of the Geriatric Nutritional Risk Index (GNRI) is to conduct a one-minute rapid nutritional risk screening for the elderly. Clinically proven to be more than 80% accurate in identifying nutritional problems in the elderly. It is much more reliable than family members' daily judgments of "fat or thin, whether food tastes good or not." It is also one of the most commonly used preliminary screening tools in communities, nursing homes, and geriatric departments.

Last month, when I was doing a free health clinic for the elderly in the community, I met a 74-year-old Uncle Li, who is 1.7 meters tall and weighs 140 pounds. His face was red and he was accompanied by his children. He said that the old man had been falling all the time recently. His bones and brain were checked and everything was fine, but he didn't know why his legs were weak. I conveniently calculated the GNRI score, and it was only 87, which is already a moderate nutritional risk. After asking for a long time, I found out that Uncle Li was afraid of high blood sugar. He didn't dare to eat polished rice and white noodles for half a year, and he only dared to eat meat once a week. He ate corn and oats every day. Although he looked fat, he had actually lost all his muscles. A blood test showed that his albumin was only 32g/L, which was far lower than the normal level. Later, I adjusted my diet. I added an egg and a cup of warm milk every day, and ate steamed fish three times a week. When I came back a month later, I said I didn’t feel out of breath after climbing the third floor.

In fact, in clinical circles, the debate on GNRI has never stopped. Many doctors in the clinical nutrition department feel that it is too extensive. The core calculation relies on three indicators: height, weight, and serum albumin. If the elderly have edema, ascites, and inaccurate weight measurement, or have liver disease and kidney disease that affects albumin metabolism, it is easy to misjudge the results. If only GNRI screening is relied on, some elderly people with sarcopenia and hidden malnutrition may be missed. But on the other hand, practitioners in grassroots public health and elderly care institutions almost all support the popularization of GNRI. The reason is very practical: you said that each elderly person should be given a complete nutritional assessment, a dietary survey, body composition analysis, and a grip strength test in half an hour. Community free clinics take one day. It is impossible to complete the test for hundreds of elderly people. GNRI uses a simple formula. Enter three numbers and the results will come out in 5 seconds. Even if there are no albumin detection conditions, there is now a simplified version that uses the weight loss in the past three months to replace it. The threshold is extremely low, and it is very suitable for large-scale rollout.

When I was coaching in a nursing home, I saw the most exaggerated examples. There used to be a semi-incapacitated old man who was bedridden for almost half a year. He had a stage II pressure sore on his sacrococcygeal area but it was not growing well. He tried several external medicines to no avail. Later, the GNRI score was only 78, which is a severe nutritional risk. I added 20g of whey protein every day and ate it with steamed egg custard. After half a month, the pressure sore began to scab. Do you think it’s amazing? In fact, it's not that the previous medicine was wrong, it's that the body doesn't even have enough raw materials to grow new meat, and no matter how expensive the medicine is, it won't work.

Of course, you can’t use GNRI as a universal ruler. I’ve been through pitfalls myself. Last year, there was an 82-year-old grandma with cirrhosis and ascites. Her weight was measured at 120 kilograms, which is 5 kilograms heavier than last year. She had just received a human albumin transfusion recently, and her indicators were within the normal range. The GNRI score was 96, which seemed perfectly fine. However, her calf circumference was measured to be only 25cm, and her grip strength was only 14kg. In fact, she had lost a lot of muscle mass, which is a typical hidden malnutrition. In this case, GNRI alone is not enough. It must be judged based on calf circumference, grip strength, and recent eating conditions.

If you have an elderly person at home, you can actually take the test yourself at home. You don’t need to memorize complicated formulas. Just search for a free GNRI calculator online and enter the elderly person’s height, current weight, and the serum albumin value from the most recent physical examination. If the score is lower than 92, Don’t rush to buy health care products that cost thousands of dollars. First, check if you haven’t been eating well recently, whether you have toothache, poor appetite, constipation or other problems that affect your eating. First, eat enough eggs, milk, and lean meat every day. If your teeth are not good, stew the rotten bits and beat them into a paste. It will be more effective than any IQ tax health product.

In fact, to put it bluntly, GNRI is a tool to remind everyone, so you don’t need to think about it too complicated. Many times, the elderly's fatigue, tendency to catch colds, wounds that do not heal, or even inexplicable depression are all caused by poor nutrition. Early detection and early adjustment are much better than going to the hospital after a real problem.