Background: Numerous studies have used smartphone applications to measure the range of motion in different joints. In addition, studies measuring the active range of motion (AROM) of the craniocervical joint have revealed high reliability. However, the subjects in these studies were all healthy subjects. No study has yet been conducted to measure the inter-rater reliability for the AROM of the craniocervical joint in stroke patients.
Objects: The purpose of this study was to investigate the inter-rater reliability of the AROM of the craniocervical joint using a smartphone.
Methods: The participants included 21 subjects who had strokes (17 males and 4 females). Two raters evaluated six types of craniocervical AROM, including flexion, extension, lateral flexion to the hemiplegic side, lateral flexion to the non-hemiplegic side, rotation to the hemiplegic side, and rotation to the non-hemiplegic side, using a goniometer and a smartphone to investigate inter-rater reliability. The inter-rater reliability was analyzed by intraclass correlation coefficients (ICC).
Results: The inter-rater reliability of the smartphone was good for extension, lateral flexion to the hemiplegic side, lateral flexion to the non-hemiplegic side, and rotation to the hemiplegic side [ICC(2,k)=.86∼.88] and excellent for flexion [ICC(2,k)=.95]. The inter-rater reliability for rotation to the non-hemiplegic side was moderate [ICC(2,k)=.72].
Conclusion: These results suggest that the smartphone offers high inter-rater reliability for measurements of the craniocervical AROM in patients with stroke.

Abstract
 Ⅰ. 서론
 Ⅱ. 연구방법
  1. 연구대상자
  2. 측정도구
  3. 실험방법
  4. 분석방법
 Ⅲ. 결과
  1. 측정결과
  2. 측정 도구에 따른 측정자간 신뢰도
 Ⅳ. 고찰
 Ⅴ. 결론
 References

• 박일우(연세대학교 대학원 물리치료학과) | Il-woo Park (Dept. of Physical Therapy, The Graduate School, Yonsei University)
• 박규남(전주대학교 의과학대학 물리치료학과) | Kyue-nam Park (Dept. of Physical Therapy, College of Medical Science, Jeonju University)
• 이충휘(연세대학교 보건과학대학 물리치료학과) | Chung-hwi Yi (Dept. of Physical Therapy, College of Health Science, Yonsei University) Corresponding author
• 문일영(연세대학교 대학원 물리치료학과) | Il-young Moon (Dept. of Physical Therapy, The Graduate School, Yonsei University)