condition mean min max ZT0-3 606.1 606.1 606.1 ZT4-7 666.2 666.2 666.2 ZT8-11 386.4 386.4 386.4 ZT12-15 464.3 464.3 464.3 ZT16-19 525.1 525.1 525.1 ZT20-23 576.9 576.9 576.9