Our stuttering data

The 15th Japanese National Fertility Survey database

P value for difference

(Confidence Intervals)

Only child

Boy

Girl

22 (21.6%)

17

5

229 (19.8%)

103

126

0.67

(0.54 to 1.47)

Siblings

80 (78.4%)

927 (80.2%)

Total

102 (100%)

1,158 (100%)