The document reports statistics from a study of 6893 patients. It found that 247 patients, or less than 20% of the total, had a condition called "KD". It also found that 7544 patients had a different condition described as "______", while 6744 patients had a third condition described as "______". The document does not provide any other details about the conditions, patients, or purpose of collecting these statistics.

1. 20111209
6 1
5 2
4 3
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6893 (3) <20%
1. 6893 247
“ “< > KD
“ “< > KD 20%
“ “< > KD
2.
“ “
7544
6744
3.

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