Fig. 2

Relationship between the level of continued pool use frequency and gross and fine motor development. Group A: Children who seldom used the swimming pool during 1–3 years of age, used as a reference. Group B: Children who seldom used the swimming pool during 1–1.5 years of age but started swimming once a month or more from 2 to 3 years of age. Group C: Children who used the swimming pool once a month or more during 1 to 1.5 years of age but quit swimming by 2–3 years of age Group D: Children who continued to use the swimming pool once a month or more from 1 to 3 years of age. 1.5y, 1.5 years (18 months); 2y, 2 years (24 months); 2.5y, 2.5 years (30 months); 3y, 3 years (36 months); aOR, adjusted odds ratio; 95% CI, 95% confidence intervals. Bold values indicate statistically significant results (p < 0.05)