condition mean min max ZT0-3 37.9 37.9 37.9 ZT4-7 87.0 87.0 87.0 ZT8-11 86.2 86.2 86.2 ZT12-15 59.4 59.4 59.4 ZT16-19 72.6 72.6 72.6 ZT20-23 89.4 89.4 89.4