Quantification of the Socio-economic Multifacet Burden of Alopecia Areata and Identification of the Associated Factors

To describe direct medical costs, hospitalizations stays, visits and additional tests will be collected using patients diary and interviews. These data will be completed by PMSI (Programme de Médicalisation des Systèmes d'Information) data of each participating hospital. Indirect costs will be limited to work stopping or working reduction time and will be collected by self reporting PelBurd Version n°2.0 of April 8, 2022 10 in patients diaries. Socio-professional category and job will be collected during the first visit in order to assess costs related job changes. These costs will be established over a period of one year on retrospective (interview) and prospective (diary) basis.

Health Realted Quality of Life will be assessed using the validated French versions of the dermatology specific questionnaire " Dermatology Life Quality Index " (DLQI). The questionnaire will be self-evaluated by patients at M0 and M6. DLQI consists of 10 questions with 4 points likert answers and ranges from 0 (no effect on QoL) to 30 maximum effect on QoL. DLQI scores can also be categorised into 5 different levels (very much, a lot, a little, not at all, not relevant) 13.

Health Realted Quality of Life will be assessed using the validated French versions of the disease specific questionnaire for AA (AA-QLI). The questionnaire will be self-evaluated by patients at M0 and M6. AA-QLI consists of 21 questions with 4 points likert answers. It is scored by averaging 3 subscales and presented on a 0 (no effect on QoL) to 100 points scale.

Evaluate the patient's perceived stress by using the validated French version of the Perceived stress scale (PSS) self-evaluated by patients at M0 and M6. The perceived stress scale consisted of 10 questions with 5 points likert answers. It ranges from 0 (no perceived stress) to 40 (highest possible perceived stress) and can be categorized into 3 different levels (low, moderate and high perceived stress)

Evaluate the impact of Alopecia Areata on depression symptoms by using the validated French version of the Patient health questionnaire 9 (PHQ-9). This questionnaire will be self-evaluated by patients at M0 and M6. The PHQ9 questionnaire consists of 9 questions with 4 points likert answers and ranges from 0 (absence of depressive symptoms) to 27 (severe depressive symptoms). PHQ-9 scores can be categorized in 5 levels (none, mild, moderate, moderately severe, severe). Patients with a PHQ-9 score above 10 should be referred to a psychiatric evaluation.

To evaluate the impact of AA on anxiety symptoms by using the validated French version of the General anxiety disorder 7 (GAD 7), self-evaluated by patients at M0 and M6. The GAD-7 consists of 7 questions with 4 points likert answers and ranges from 0 (absence of anxious symptoms) to 27 (severe anxious symptoms). GAD-7 scores can be categorized in 4 levels (none, mild, moderate, severe).

To describe the care pathway for Alopecia Areata patients (delay to diagnosis and treatment), the clinician will report during the first consultation (M0), the number of consulted physicians and the following dates: first symptoms, first appointment with a medical doctor (MD), first appointment with a dermatologist, diagnosis, beginning of the first treatment. In rare or neglected diseases diagnostic delay is usually defined as the delay between first consultation with a MD and the final diagnosis . We will also calculate the delay to consultation (defined as the time between first symptoms and first consultation with a MD), the delay to dermatologist consultation (defined as the time between first consultation with a MD and first consultation with a dermatologist) and the delay to first treatment (defined as the time between the first consultation with a MD and the first treatment).

To describe the impact of AA on work productivity, we will use the validated French version of the Work Productivity and Activity Impairment (WPAI) (self-assessed by patients at M0 and M6). The WPAI is a 6 questions score that assesses hours missed at work, loss of productivity at work and in daily activities because of a specific health issue. The WPAI is expressed as 4 impairments: percent work time missed due to health, percent impairment while working due to health issue, percent overall work impairment due to health issue, percent activity impairment due to health issue