Assess the Long Term Efficacy and Safety of Ruxolitinib Cream in Participants With Vitiligo

Percentage of Participants Achieving a ≥90% Improvement From Baseline in the F-VASI (F-VASI90) Score During the Extension Treatment Period

An F-VASI90 responder achieved at least 90% improvement from Baseline in F-VASI, measured by the percentage of vitiligo involvement (percentage of BSA) and the degree of depigmentation: 0% (no depigmentation), 10% (only specks of depigmentation), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment), or 100% (no pigment). The percentage of BSA (hand unit) vitiligo involvement was estimated to the nearest 0.1% by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate the percentage of BSA vitiligo involvement. F-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site on the face and summing the values of all sites (possible range: 0-3; lower scores indicate increased improvement).

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Mean F-VASI Scores During the Extension Treatment Period

F-VASI was measured by the percentage of vitiligo involvement (percentage of BSA) and the degree of depigmentation: 0% (no depigmentation), 10% (only specks of depigmentation), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment), or 100% (no pigment). The percentage of BSA (hand unit) vitiligo involvement was estimated to the nearest 0.1% by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate the percentage of BSA vitiligo involvement. F-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site on the face and summing the values of all sites (possible range: 0-3; lower scores indicate increased improvement).

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Change From Baseline in F-VASI Scores During the Extension Treatment Period

F-VASI was measured by the percentage of vitiligo involvement (percentage of BSA) and the degree of depigmentation: 0% (no depigmentation), 10% (only specks of depigmentation), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment), or 100% (no pigment). The percentage of BSA (hand unit) vitiligo involvement was estimated to the nearest 0.1% by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate the percentage of BSA vitiligo involvement. F-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site on the face and summing the values of all sites (possible range: 0-3; lower scores indicate increased improvement). Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percent Change From Baseline in F-VASI Scores During the Extension Treatment Period

F-VASI was measured by the percentage of vitiligo involvement (percentage of BSA) and the degree of depigmentation: 0% (no depigmentation), 10% (only specks of depigmentation), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment), or 100% (no pigment). The percentage of BSA (hand unit) vitiligo involvement was estimated to the nearest 0.1% by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate the percentage of BSA vitiligo involvement. F-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site on the face and summing the values of all sites (possible range: 0-3; lower scores indicate increased improvement). Percentage change = (\[post-BL value minus BL value\]/BL value) X 100.

Time frame: Baseline (BL); up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percentage of Participants Achieving a ≥50% Improvement From Baseline in the Total Body Vitiligo Area Scoring Index (T-VASI50) Score During the Extension Treatment Period

A T-VASI50 responder achieved at least 50% improvement from Baseline in T-VASI, calculated with contributions from 6 sites. The percentage of vitiligo involvement was estimated in hand units (percentage of BSA estimated to nearest 0.1%) by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate percent BSA vitiligo involvement. The degree of depigmentation for each site was estimated to the nearest percentage: 0% (no depigmentation present), 10% (only specks of depigmentation present), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment present), 100% (no pigment present). T-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site and summing the values (range: 0-100; lower scores indicate increased improvement).

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percentage of Participants Achieving a ≥75% Improvement From Baseline in the T-VASI (T-VASI75) Score During the Extension Treatment Period

A T-VASI75 responder achieved at least 75% improvement from Baseline in T-VASI, calculated with contributions from 6 sites. The percentage of vitiligo involvement was estimated in hand units (percentage of BSA estimated to nearest 0.1%) by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate percent BSA vitiligo involvement. The degree of depigmentation for each site was estimated to the nearest percentage: 0% (no depigmentation present), 10% (only specks of depigmentation present), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment present), 100% (no pigment present). T-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site and summing the values (range: 0-100; lower scores indicate increased improvement).

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percentage of Participants Achieving a ≥90% Improvement From Baseline in the T-VASI (T-VASI90) Score During the Extension Treatment Period

A T-VASI90 responder achieved at least 90% improvement from Baseline in T-VASI, calculated with contributions from 6 sites. The percentage of vitiligo involvement was estimated in hand units (percentage of BSA estimated to nearest 0.1%) by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate percent BSA vitiligo involvement. The degree of depigmentation for each site was estimated to the nearest percentage: 0% (no depigmentation present), 10% (only specks of depigmentation present), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment present), 100% (no pigment present). T-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site and summing the values (range: 0-100; lower scores indicate increased improvement).

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Mean T-VASI Scores During the Extension Treatment Period

T-VASI was calculated with contributions from 6 sites. The percentage of vitiligo involvement was estimated in hand units (percentage of BSA estimated to nearest 0.1%) by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate percent BSA vitiligo involvement. The degree of depigmentation for each site was estimated to the nearest percentage: 0% (no depigmentation present), 10% (only specks of depigmentation present), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment present), 100% (no pigment present). T-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site and summing the values (range: 0-100; lower scores indicate increased improvement).

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Change From Baseline in T-VASI Scores During the Extension Treatment Period

T-VASI was calculated with contributions from 6 sites. The percentage of vitiligo involvement was estimated in hand units (percentage of BSA estimated to nearest 0.1%) by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate percent BSA vitiligo involvement. The degree of depigmentation for each site was estimated to the nearest percentage: 0% (no depigmentation present), 10% (only specks of depigmentation present), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment present), 100% (no pigment present). T-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site and summing the values (range: 0-100; lower scores indicate increased improvement). Change from Baseline=post-Baseline value minus the Baseline value.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percent Change From Baseline in T-VASI Scores During the Extension Treatment Period

T-VASI was calculated with contributions from 6 sites. The percentage of vitiligo involvement was estimated in hand units (percentage of BSA estimated to nearest 0.1%) by the Investigator using the Palmar Method. The Investigator used his/her hand to mimic the participant's hand size to evaluate percent BSA vitiligo involvement. The degree of depigmentation for each site was estimated to the nearest percentage: 0% (no depigmentation present), 10% (only specks of depigmentation present), 25% (pigmented area exceeded depigmented area), 50% (depigmented and pigmented area was equal), 75% (depigmented area exceeded pigmented area), 90% (specks of pigment present), 100% (no pigment present). T-VASI was then derived by multiplying the values assessed for the vitiligo involvement by the percentage of affected skin for each site and summing the values (range: 0-100; lower scores indicate increased improvement). Percentage change = (\[post-BL value minus BL value\]/BL value) X 100.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Mean Facial Body Surface Area (F-BSA) During the Extension Treatment Period

F-BSA involvement was the proportion of the facial body surface area with vitiligo. The area "Face" was defined as including the area on the forehead to the original hairline, on the cheek to the jawline vertically to the jawline and laterally from the corner of the mouth to the tragus. The area "Face" did not include surface area of the lips, scalp, ears, or neck, but included the nose and eyelids. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA. Data are presented as the percentage of BSA involvement in the face as compared to total BSA.

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Change From Baseline in F-BSA During the Extension Treatment Period

F-BSA involvement was the proportion of the facial body surface area with vitiligo. The area "Face" was defined as including the area on the forehead to the original hairline, on the cheek to the jawline vertically to the jawline and laterally from the corner of the mouth to the tragus. The area "Face" did not include surface area of the lips, scalp, ears, or neck, but included the nose and eyelids. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA. Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Data are presented as the percentage of BSA involvement in the face as compared to total BSA.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percent Change From Baseline in F-BSA During the Extension Treatment Period

F-BSA involvement was the proportion of the facial body surface area with vitiligo. The area "Face" was defined as including the area on the forehead to the original hairline, on the cheek to the jawline vertically to the jawline and laterally from the corner of the mouth to the tragus. The area "Face" did not include surface area of the lips, scalp, ears, or neck, but included the nose and eyelids. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA. Percentage change = (\[post-Baseline (BL) value minus BL value\]/BL value) X 100.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Mean Total Body Surface Area (T-BSA) During the Extension Treatment Period

T-BSA involvement was the proportion of the body surface area with vitiligo. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA. Data are presented as the percentage of BSA involvement in the total body.

Time frame: up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Change From Baseline in T-BSA During the Extension Treatment Period

T-BSA involvement was the proportion of the body surface area with vitiligo. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA. Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Data are presented as the percentage of BSA involvement in the total body.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percent Change From Baseline in T-BSA During the Extension Treatment Period

T-BSA involvement was the proportion of the body surface area with vitiligo. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA. Percentage change = (\[post-Baseline (BL) value minus BL value\]/BL value) X 100.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Percentage of Participants Achieving a Vitiligo Noticeability Scale (VNS) Score of 4 or 5 During the Extension Treatment Period

The VNS is a patient-reported measure of vitiligo treatment success that is rated on a 5-point scale. The Baseline facial photograph was shown to the participants for reference, and a mirror was provided for the participants to assess the vitiligo on their face. The participant was asked to respond to the following query: Compared with before treatment, how noticeable is the vitiligo now? Responses: (1) more noticeable, (2) as noticeable, (3) slightly less noticeable, (4) a lot less noticeable, and (5) no longer noticeable.

Time frame: Baseline; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Change From Week 52 in Dermatology Life Quality Index (DLQI) Total Score During the Extension Treatment Period

The DLQI is a simple, 10-question validated questionnaire to measure how much the skin problem has affected the participant over the previous 7 days. Participants age ≥16 years answered the questionnaire with: (1) very much; (2) a lot; (3) a little; or (4) not at all. The questionnaire was analyzed under 6 headings: Symptoms and feelings (Questions 1 and 2); Daily activities (Questions 3 and 4); Leisure (Questions 5 and 6); Work and school (Question 7); Personal relations (Questions 8 and 9); and Treatment (Question 10). The scoring of each question is as follows: very much = 3; a lot = 2; a little = 1; not at all = 0; not relevant = 0. For Question 7, "prevented work or studying"=3. The total score ranges from 0 to 30; higher scores indicate higher quality of life. Change from Week 52 was calculated as the post-Week 52 value minus the Week 52 value.

Time frame: Week 52; up to up to Week 104 of Extension Study (Week 52 was the first visit of this Treatment Extension study.)

Change From Week 52 in Children's Dermatology Life Quality Index (CDLQI) Total Score During the Extension Treatment Period

The CDLQI is the youth/children's version of the DLQI. The DLQI is a simple, 10-question validated questionnaire to measure how much the skin problem has affected the participant over the previous 7 days. Participants age \<16 years answered the questionnaire with: (1) very much; (2) a lot; (3) a little; or (4) not at all. The questionnaire was analyzed under 6 headings: Symptoms and feelings (Questions 1 and 2); Leisure (Questions 4, 5, and 6); School or holidays (Question 7); Personal relationships (Questions 3 and 8); Sleep (Question 9); and Treatment (Question 10). The scoring of each question is as follows: very much = 3; quite a lot = 2; only a little = 1; not at all = 0; question unanswered = 0. The total score ranges from 0 to 30; higher scores indicate higher quality of life. Change from Week 52 was calculated as the post-Week 52 value minus the Week 52 value.

Time frame: Week 52; up to Week 104 of Treatment Extension (Week 52 was the first visit of this Treatment Extension study.)

Number of Participants With Any Treatment-emergent Adverse Event (TEAE)

A TEAE was defined as any adverse event (AE) reported for the first time or the worsening of a pre-existing event after the first application of study drug in this study. An AE was defined as any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug-related. An AE could therefore have been any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment.

Time frame: up to approximately Week 108 (Week 52 was the first visit of this Treatment Extension study.)

Trough Plasma Concentrations of Ruxolitinib at Week 80 and Week 104

The steady-state plasma concentration was assessed. Pharmacokinetic blood samples could have been collected at any time prior to study drug application at the site at the Week 80 visit and at any time at the Week 104 (End of Trial) visit. Results from the two parent studies indicated that steady state was reached at or before Week 4, and that, hence, the use of vehicle or ruxolitinib 1.5% in the first 52 weeks of treatment had no impact on the ruxolitinib plasma concentration at the Week 80 and Week 104 (End of Treatment) visits. Thus, the two Cohort B cohorts were combined into a single arm for data analysis in this study.

Time frame: Weeks 80 (predose); Week 104 (any time post-dose) (Week 52 was the first visit of this Treatment Extension study.)