Birth time category | Observed number | Expected number | p value |
Zi, Wu, Mao, You (only those with 1 whorl on the center line of the midline were count) | 40 (Zi), 20 (Wu), 22 (Mao), 35 (You) | 68 (Zi), 75 (Wu), 63 (Mao), 63 (You) | 0.039120916 |
Chen, Shu, Chou, Wei (only those with 2 whorls were count) | 5 (Chen), 2 (Shu), 9 (Chou), 7 (Wei) | 61(Chen), 31 (Shu), 42 (Chou), 52 (Wei) | 0.000000026 |
Yin, Shen, Si, Hai (only those with 1 whorl, either on the left or right side from the midline were count) | 30 (Yin), 37 (Shen), 29 (Si), 40 (Hai) | 46 (Yin), 54 (Shen), 53 (Si), 49 (Hai) | 0.002665066 |