condition mean min max ZT0-3 168.7 168.7 168.7 ZT4-7 377.5 377.5 377.5 ZT8-11 326.1 326.1 326.1 ZT12-15 294.25 294.25 294.25 ZT16-19 213.7 213.7 213.7 ZT20-23 185.2 185.2 185.2