Mechanical neck pain is a prevalent problem in community and it can lead to disability.

In current community, increasing of life stress on individual may lead to sleep disorders, mental and physical fatigue.

Objectives of study is to investigate the effect of sleep quality, mental and physical fatigue on mechanical neck pain.

Methods and Materials Two hundred thirty individuals were having mechanical neck pain . Neck disability index, chalder fatigue scale and Pittsburg sleep quality index were applied on all individuals participating in the study , NDI was used to determine the pain and functional disability of the participants , PSQI was used to assess the sleep quality, lastly the CFS was used to determine

Our study considered as an observational cross - sectional study.

Sample size :

Individual's ;230 patient with mechanical neck pain will participate in the study The inclusion criteria were age between 18 -60 years , who do have neck disability index score more than (4) points, they have being included in our study. The exclusion criteria were people who are having any cervical injury( fracture,whiplash injury) cervical disc , neurological disease, past surgery in neck region. Also we excluded who has been scored with 4 points or less in NDI . The study will be in the out clinic of orthopedic in faculty of physical therapy , cairo university

Material tool :

We used three index , NECK DISABILITY INDEX [NDI] , CHALDER FATIGUE SCALE [CFS] , PITTSBURGH SLEEP QUALITY SCALE [PSQI]. -NDI : neck disability index is consists of 10 questions including = pain severity,ability of personal care ,lifting weight, job capability, headaches intense , concentration, quality of sleeping and driving and recreation activities. The total score ranges between 0- 50 points . Zero to 4 points mean( NO DISABILITY), 5 to 14 points means (LIGHT DISABILITY ) , 15 to 24 points means ( MODERATE DISABILITY ), 25 to 34 points means (SEVERE DISABILITY) 35 to 50 points means (COMPLETE DISABILITY).

- CFS : The CFS is consisting of 11 questions including a seven item physical fatigue subdimension and a four item mental fatigue sub-dimension.The physical fatigue subdimension score ranges from 0 to 21, the mental fatigue sub-dimension score from 0 to12 The total fatigue score is from 0-33. High scores indicates a greater fatigue level.

- PSQI : The scale is consisting of 24 items,19 items are filled by the individuals,while 5 are filled by the bedmate*if they have one*. 18 of 19 items that filled by the individual himself

\herself are scored and used to asses sleep quality,while the remaining 6 items are used to have clinical inflammation. It has 7 components:

1. subjective sleep quality
2. sleep latency
3. sleep duration
4. habitual sleep efficiency
5. sleep disturbances
6. use of sleeping pills
7. day time dysfunction . The total PUKIN score is obtained by summing the score of the components. The total of each item is 0-3 while the total score of PUKI is ranging between 0-21 . High score indicates poor sleep quality. A total score of 5 or less is indicating good sleep quality, while scores above 5 indicates poor sleep quality.

Inclusion Criteria:

• The inclusion criteria were age between 18 -60 years , who do have neck disability index score more than (4) points, they have being included in our study.

Exclusion Criteria:

• The exclusion criteria were people who are having any cervical injury( fracture,whiplash injury) cervical disc , neurological disease, past surgery in neck region. Also we excluded who has been scored with 4 points or less in NDI

Our study considered as an observational cross - sectional study. 230 patients will participate in the stuudy The inclusion criteria will be age between 18 -60 years , who do have neck disability index score more than (4) points, they have being included in our study. The exclusion criteria were people who are having any cervical injury( fracture,whiplash injury) cervical disc , neurological disease, past surgery in neck region. Also we excluded who has been scored with 4 points or less in NDI . The study was on online survey we used what'sup app and telegram app