This study aims to investigate the association between NDI categories (None, Mild, Moderate, Severe) and ROM in six directions: flexion, extension, right and left side bending, and right and left rotation. Additionally, it seeks to identify which movements are most affected by neck disability and explore their predictive value for overall ROM changes.

Neck pain is a prevalent musculoskeletal condition that affects a significant portion of the population, with substantial implications for daily functioning and quality of life. The Neck Disability Index (NDI) is a widely used tool to assess the severity of neck pain and its impact on functional activities. Understanding how neck disability correlates with physical impairments, such as reduced range of motion (ROM), is crucial for effective diagnosis and management of this condition.

Despite the established relationship between neck pain and functional limitations, there is limited research quantifying the specific impact of varying levels of neck disability on multidirectional ROM. Furthermore, key directions of movement most affected by neck pain remain underexplored, limiting the ability of clinicians to target interventions effectively.

Scope and Limitations This cross-sectional study focuses on ROM measurements and their relationship with NDI categories. While providing valuable insights, it does not assess changes over time or include other factors such as muscle strength or pain intensity. Addressing these aspects in future research can provide a more comprehensive understanding of neck pain and its implications.

This cross-sectional study included 80 patients diagnosed with neck pain. Participants were categorized into four groups based on their Neck Disability Index (NDI) scores: None, Mild, Moderate, and Severe. Inclusion criteria required participants to have chronic neck pain, while individuals with systemic diseases or comorbid conditions affecting mobility were exclude.

Neck range of motion (ROM) was measured in six directions: flexion, extension, right and left side bending, and right and left rotation. ROM was assessed using a standardized goniometer, and all measurements were performed by the same trained examiner to ensure consistency. NDI scores were obtained through a validated self-reported questionnaire.

Inclusion Criteria:

1. Both male & female
2. Aged 25-60
3. BMI 18.5: 25
4. With cervical radiculopathy that persist for more than 3 months

Exclusion Criteria:

1. Prior surgery to the cervicothoracic spine
2. Bilateral symptoms
3. Signs of upper motor neuron impairments
4. Cervical spine injection in the previous 4 weeks
5. Current use of steroidal anti-inflammatory drugs

This study will be conducted in the out-patient clinic Faculty of physical therapy, Cairo University. The expected duration to recruit patients and collect data is 6 months .