condition mean min max ZT0-3 80.8 80.8 80.8 ZT4-7 182.3 182.3 182.3 ZT8-11 146.9 146.9 146.9 ZT12-15 87.0 87.0 87.0 ZT16-19 51.9 51.9 51.9 ZT20-23 83.2 83.2 83.2