If you have a first-degree relative with type 1 diabetes, your relative risk of developing type 1 diabetes increases by about 10 times.
However, the prevalence of type 1 diabetes in Asian races such as Koreans, Japanese, and Chinese is very low, less than 0.1%.
Therefore, even if the relative risk increases tenfold, it is very rare to have a family member with type 1 diabetes.
When evaluated based on genetic predisposition such as family history, Koreans have a much lower genetic predisposition to type 1 diabetes compared to type 2 diabetes.

---p.41

The half-life of insulin normally secreted from the pancreas is short, at 3 to 5 minutes.
However, if the half-life of insulin injected externally is shortened, the occurrence of hypoglycemia is reduced, but there is a disadvantage of having to inject insulin frequently.
To overcome these drawbacks, using insulin injections with long half-lives and durations of action increases the risk of unexpected hypoglycemia.

---p.56

Prescriptions, tax invoices, transaction statements/purchase receipts, and medical expense payment claims are submitted by visiting a branch office of the National Health Insurance Corporation, by mail, or via the Internet (medical expense computerized claim system).
Usually, the medical expenses are deposited into the account written on the payment claim within 2 to 5 days after application.
If the medical expenses are not deposited after two weeks, you can call the National Health Insurance Corporation to which you submitted the documents.

---p.78

Looking at the child's blood sugar level, it was generally hyperglycemic.
So, we lowered the blood sugar very gradually so that the body could properly recognize the normal blood sugar range.
In such cases, it is better to lower blood sugar levels gradually to give our bodies time to adapt rather than just looking at the numbers and rapidly lowering them to normal levels.

---p.87

Do not inject large amounts of insulin into one area at once.
Especially for insulin pump users, the needle stays in one place for about three days.
Therefore, it is recommended to inject insulin in small doses and slow down the injection speed so that it is injected slowly.
Pump needles should not be used in the same area for more than 4 days, and their positions should be changed so that they do not overlap.

---p.99

You should always carry your medical certificate with you.
So it's a good idea to put it in your bag with your passport or wallet.
Instead of packing all your other items in one bag, divide them into 2-3 travel bags.
This is because you need to have consumables available at all times in case you lose your bag or check it in.

---p.123

The xDrip+ or Spike app collects blood sugar data from a continuous glucose monitor using a smartphone or smartwatch and uploads it to the cloud, which can then be linked to the Nightscout web app or APS app.
For the Glimp app, you can collect data from a continuous glucose monitor that collects blood sugar levels via NFC or upload data using a Bluetooth device (MiaoMiao, Bubble, BluCon). After uploading, you can connect it in the same way as xDrip+ or Spike.

---p.150

When you enter a remote injection command in text, you must reply by combining a number string (6 digits) generated in real time through the OTP app linked to the master app and a pre-determined number string (3-4 digits) to enable remote injection.
Therefore, unauthorized persons cannot perform remote injections.

---p.164

Insulin sensitivity can be affected by poor diet, but often the cause is unknown.
For women, sensitivity may vary depending on ovulation or menstrual cycle, and for adolescents, sensitivity may vary during rapid growth periods.
Because insulin sensitivity varies due to uncontrollable variables, it may take some trial and error to get a feel for it.

---p.180

The best way is to lower your blood sugar with a small dose of insulin, then when your blood sugar is back in the normal range, inject the insulin for the food again and eat the food.
However, if you cannot wait, inject ultra-rapid-acting insulin rather than rapid-acting insulin.
Ultra-rapid-acting insulin has a faster onset than rapid-acting insulin.
So it's useful when you need to eat food in a hurry.

---p.205

The reasons for the existence of patient groups may vary depending on the disease.
Yet, there is only one thing in common.
The point is that patient groups are absolutely necessary for patients.
Type 1 diabetes has a long duration of illness, so management should not be neglected at any time.
Above all, it is important to create a medical, technological, and social environment that can effectively manage blood sugar levels.

---p.234

Among continuous glucose monitors, there are some that do not require calibration or do not require calibration at all.
However, these products may require calibration when used.
For products that do not have compensation, if there is a large difference between the actual blood sugar level and the sensor blood sugar level, you will need to check your blood sugar level more frequently while wearing the device or remove the expensive sensor.
Another product can be calibrated, but if there is a large difference between the sensor blood sugar and the actual blood sugar check result, the blood sugar level will not be displayed for a certain period of time after calibration and recalibration is not possible.

---p.257

Type 1 diabetes is probably the disease for which the most patient-generated health data (PGHD) can be collected.
In the past, the cloud database company used by people with type 1 diabetes was an overseas company, and the DB size that could be used (500MB) was limited.
There was also an issue where the DB had to be moved according to the company's policy.
Additionally, because I personally managed the data, the data was fragmented and could not be properly utilized for treatment or research.
So, a service (T1pal) that manages Night Scout data for a fee has appeared overseas.

---p.261

However, if parents waver in front of their child who is about to enter a period of storm and stress, it is obvious that the child will not be able to overcome the strong winds.
That is why parents must first accept diabetes.
If even parents can't accept diabetes, how can they expect their children to accept it? Accepting and recovering from diabetes isn't a grand task.
The process of recovering from diabetes is to fully look after the child and to provide parents with interest and support for the child's future with diabetes.

---pp.279-280

The fact that I am good at math is also related to the fact that I have type 1 diabetes.
Type 1 diabetics must determine the amount of insulin by looking at and calculating blood sugar levels as well as carbohydrate intake.
So, naturally, you have to become familiar with numbers.

---p.321