* papal court article on page 869. ...

* papal court article on page 869.

Evidenced-based guidelines are still subjective. That statement summarizes the rather frightening conclusion I made after my first involvement in a large-scale effort to engage in literature review, synthesis, and preparation of evidenced-based guidelines as part of the Kidney Disease result Quality Initiative (K/DOQI) of the National Kidney Foundation (NKF)

I count upon that my conclusion about the subjectivity of evidence-based guidelines appears heretical, but I was not altogether surprised. In the 30 years since I began my medical education, I have observ that medical opinions "based forward the literature" change. I will none forget my third year of medical drill at the University of California, beholds Angeles, when a young (now older and famous) infectious disease specialist, talking to our small clump of on-service students, avowed, "You can't say anything without an article, however the evidence keeps changing!" That was a conversation stopper--for me anyway.

I know that quoting an article is not the same as referring to a conclusion that follows from a rigorous evidence-based review, and that the power of evidence from a single article is weak, nevertheless I was struck by for what reason even when an initial literature search yields thousands of articles, there will be hardly any articles that can be compared easily. It is equal difficult to narrow down a topic in a manner that allows reasonable comparisons.

Do not think that I am being negative--I actually was fascinated. I was encloseed by experts in the field of chronic kidney disease. These professionals were friendly, inclusive, and hardworking, if it were not that the evidence-extraction process was painful for all of us. At all grades along the way, subjective decisions had to be made. For example, the data summary form that a member of the team prepared for our use dictated what data would be extracted for later use and, to any extent, how it would be interpreted. From this beginning, we sorted and combined information, and then began debating what the evidence really was saying to us. completely through the process, more subjective interpretation was required than I would have count uponed Individual biases could not be remov totally from the equation--nor, in my opinion, should they have been.

Finally, we began to write the guidelines. I could be excited the near desperation of near Work Group members who believed deep that certain guidelines were crucial to the appropriate management of the patient with chronic kidney disease, although the evidence in favor of these guidelines did not have the appearance to be compelling. For my part, I was keenly aware of my character of representing practicing family physicians who would be responsible for carrying on the outside the guidelines within the largest portion of the population. Were the guidelines practical? Were they affordable? Would the care of our patients be improved by means of adherence to these guidelines? Would funding or oversight agencies use nonadherence to the guidelines against us? by what means could we become attuned to a wager of guidelines on a topic that is to a great degree less familiar to us than hypertension or high cholesterol levels?

Eventual consensus deductioned in the NKF K/DOQI guidelines that were published in 2002 (12) and now are being summarized in a two-part article in American Family Physician. (34) I am pleased with the guidelines. I supported their use from family physicians and immediately began incorporating them into my practice.

During the proces of developing the clinical practice guidelines, I greatly increased my understanding of chronic kidney disease. For me the chiefly important lessons were as follows:

* Chronic kidney disease is greatly underdiagnosed and undertreated, resulting in squandered opportunities for prevention.

* Chronic kidney disease is defined on the presence of proteinuria and a decreased glomerular filtration rate (GFR)

* Standard urine dipsticks are acceptable screening tools for proteinuria.

* Proteinuria can be diagnosed by the agency of a ratio of greater than 30 mg of albumin to 1 g of creatinine in an untimed (spot) urine sample. A 24-hour urine collection, which often is incomplete, does not yield a more accurate result

* The GFR is superior to the serum creatinine concentration as the best overall index of kidney function and should be used for staging the disease.

* The GFR can be estimated using standard prediction equations. A 24-hour urine collection is not required for estimating the GFR

In summary, the K/DOQI guidelines commend testing for proteinuria and estimating the GFR in patients who are at risk for chronic kidney disease.

The proces of applying clinical evidence to practical recommendations is evolving. It already had evolv by way of the time that I participated in an NKF Work collection on hypertension in chronic kidney disease. As this proces continues to improve, I am reassured that the principles involved in evidence-based medicine remain hale I urge family physicians to participate in the formulation of clinical practice guidelines if they are given the opportunity to do so