... If you mean that your mother had two different blood tests done at two different labs and they came up with two different TC numbers, this is not surprising. They are likely using the same testing protocol, but these numbers are not absolutes like your height. In other words, you could have the very same lab take a sample, five minutes later take another sample. Then send... (6 replies)

... Do you know what is the standard way of calculating total cholesterol level? ... (6 replies)

... The Friedewald Formula is normaly used to estimate LDL cholesterol. The only lipids that are directly read are TC, TG and HDL. The formal uses the following calculation:
Estimation of LDL Cholesterol = Total Cholesterol – HDL Cholesterol – VLDL Cholesterol*
* Estimation of VLDL Cholesterol = Trigs/5 (Trigs/2.2 for mmol/L) (6 replies)

... Great explanation...
So... here is the calculation:
Divide your Triglycerides by 5 113/5 = 22.6
Now, the formula is: (6 replies)

... Hey bigal, your forumla is identical to the one you said was wrong. You said:
LDL = TC - HDL - (Trigs/5)
Which just happens to be the same exact forumula as:
TC = LDL + HDL + (Trigs/5). (6 replies)

... No the formula is wrong the correct one is
Total cholesterol minus HDL minus the (Triglycerides divided by 5)
So here is an example Chol.=174 Trig= 296 HDL= 54 LDL=60.8
174 - 54=120
296. divided by 5=59.2
120
-59.2
60.8 (6 replies)

... and very low triglyceride level. And don't worry about that LDL of 170 because that number isn't accurate. See, on the majority of lipid tests the lab measures total cholesterol, HDL, and triglycerides but they calculate LDL rather than measure it. ... (7 replies)

... I was confused when I found out how Total Cholesterol is calculated. ... (6 replies)

... I don't think it is correct that HDL and LDL are the same, you might want to go over the numbers again. LDL is typically much higher than HDL. Those numbers don't really add up properly. Call them again to get the numbers. In the US, at least, you can ask for a copy of the report as well; hopefully, you can do that there as well so you have a hard copy.
The basic... (1 replies)

... There SHOULD be no difference in the cholesterol measurement from lab to lab. ... (6 replies)

... (2 replies)

... I understand that if you divide a certai number of your cholesterol with another number, either HDL, LDL or toal, you get a number between 1,0 and 5.0 that tells you where you should be. ... (2 replies)

... A common method is to divide total by HDL to get a ratio. The lower the ratio the better. A ratio of about 4. ... (2 replies)

... AFAIK the direct calculation of LDL is accurate without regard to elevated triglyceride levels. ... (20 replies)

... There is more to the calculation than you have included. One factor is your total cholesterol. ... (1 replies)

... the trick is to lower total cholesterol also and boost HDL. ... (24 replies)

... Would individuals with these cholesterol balances be at high risk or low risk for developing heart disease? ... (19 replies)

... Something is clearly amiss here and you can't know for certain without a new test. A likely candidate for error is the simple calculation for LDL, but you can't know this without a new test. Insist that whoever is providing you the results double check their findings before giving them to you. ... (7 replies)

... At last calculation mine was 67. I believe there may be something to the reversal just from my own experiences. ... (8 replies)

... Its not really conflicting because HDL is your "good" cholesterol which helps counteract the "bad" LDL cholesterol so keeping your LDL, HDL and trigs in range individually and having a good ratio is more important than the total (6 replies)