Title Page

Contents

국문요약 8

Ⅰ. Introduction 9

Ⅱ. Materials and Methods 11

1. Study design and setting 11

2. Exposure definition 11

3. Outcome definition 11

4. Covariate definition 12

5. Data analysis 13

Ⅲ. Results 14

1. Incidence of congenital muscular torticollis in Korea 14

2. Associated comorbidities in children with CMT 14

3. Neurodevelopmental outcome 14

Ⅳ. Discussion 15

Ⅴ. Conclusion 18

References 19

Appendix 22

Abstract 29

Table 1. Demographic characteristics of the study population 24

Table 2. Associated comorbidities in children with congenital muscular torticollis 26

Table 3. Incidence of comorbidities in children with congenital muscular torticollis 27

Table 4. Outcomes of the 5th-7th developmental screening sessions in children with congenital muscular torticollis[이미지참조] 28

Figure 1. Flow diagram of the study participant enrollment 22

Figure 2. Associated comorbidities of children with congenital muscular torticollis 23