Table 1: Differences in median fluoride concentration and interquartile range among 4 types of green tea, measured in 20 samples of each.
The following tea types were significantly different at the p < 0.001 level: control versus Sri Lanka, control versus China, control versus South Korea, Sri Lanka versus China, China versus Japan, and South Korea versus Japan.The following types were significantly different at the p = 0.029 level: control versus Japan, Sri Lanka versus South Korea, Sri Lanka versus Japan and China versus South Korea.
