condition mean min max ZT0-3 203.9 203.9 203.9 ZT4-7 121.6 121.6 121.6 ZT8-11 130.9 130.9 130.9 ZT12-15 165.2 165.2 165.2 ZT16-19 238.5 238.5 238.5 ZT20-23 228.7 228.7 228.7