A Study to Evaluate the Safety and Efficacy of Tazarotene Foam, 0.1%, in Subjects With Common Facial Acne

LC: count of all ILs (i.e., papules, pustules, and nodules) and NILs (i.e., open and closed comedones) at Baseline and at Week 12. TLs were calculated as the sum of ILs and NILs. LC was confined to the face (including forehead, nose, checks, and chin). Percent change from Baseline in LC at Weeks 2, 4, 8, and12 was calculated as the (Week 2/4/8/12 value minus the baseline value divided by baseline value) x 100.

LC: count of all ILs (i.e., papules, pustules, and nodules) and NILs (i.e., open and closed comedones) at Baseline and at Week 12. TLs were calculated as the sum of ILs and NILs. LC was confined to the face (including forehead, nose, checks, and chin). Change from Baseline at Week 12 was calculated as the value at Week 12 minus the value at Baseline. Calculation was based on last observation carried forward (LOCF) imputation method for missing data.

Time to a 50 percent reduction in TLC (sum of ILs and NILs) was the time difference between Baseline and the time to 50 percent reduction in LC. Participants who did not have a >=50 percent reduction from Baseline in TLC during the study were censored at their last visit date.

Investigators evaluated the acne severity (S) of the participants' face using the ISGA scale, ranging from 0 to 5: 0=clear skin with no ILs or NILs; 1=almost clear: rare NIL with no more than rare papules; 2=mild S: >G 1, some NILs with no more than a few ILs (papules/pustules only, no nodular lesions [NLs]); 3=moderate S: >G 2, up to many NILs and may have some ILs, but no more than one small NL; 4=severe: greater than G 3, up to many NILs and ILs, but no more than a few NLs; 5=very severe: many NILs and ILs and more than a few NLs, may have cystic lesions.

Investigators evaluated the acne severity (S) of the participants' face using the ISGA scale, ranging from 0 to 5: 0=clear skin with no ILs or NILs; 1=almost clear: rare NIL with no more than rare papules; 2=mild S: >G 1, some NILs with no more than a few ILs (papules/pustules only, no nodular lesions [NLs]); 3=moderate S: >G 2, up to many NILs and may have some ILs, but no more than one small NL; 4=severe: greater than G 3, up to many NILs and ILs, but no more than a few NLs; 5=very severe: many NILs and ILs and more than a few NLs, may have cystic lesions.

An SGA of the facial skin, excluding the scalp, was performed by participants using a rating scale of 0 to 4: 0=face is basically free of acne, with only an occasional blackhead (Bh) and/or whitehead (Wh); 1=face has several Bhs and/or Whs and small pimples (P), but there are no tender deep-seated bumps or cysts (DSBCs); 2=face has several to many Bhs and/or Whs and small- to medium-sized P, and may have one DSBC; 3=face has many Bhs and/or Whs, many medium- to large-sized P, and perhaps a few DSBCs; 4=face has Bhs and/or Whs, and several to many medium- to large-sized Ps and DSBCs dominate.

Investigators evaluated the acne severity (S) of the participants' face using the ISGA scale, ranging from 0 to 5: 0=clear skin with no ILs or NILs; 1=almost clear: rare NIL with no more than rare papules; 2=mild S: >G 1, some NILs with no more than a few ILs (papules/pustules only, no nodular lesions [NLs]); 3=moderate S: >G 2, up to many NILs and may have some ILs, but no more than one small NL; 4=severe: greater than G 3, up to many NILs and ILs, but no more than a few NLs; 5=very severe: many NILs and ILs and more than a few NLs, may have cystic lesions.

A papule is a circumscribed, solid elevation of the skin with no visible fluid. Change from basline in papule count at Weeks 2, 4, 8, and 12 was calculated as the papule count at Week 2/4/8/12 minus the papule count at Baseline.

A pustule is a small elevation of the skin containing cloudy or purulent material usually consisting of necrotic inflammatory cells. Change from basline in pustule count at Weeks 2, 4, 8, and 12 was calculated as the pustule count at Week 2/4/8/12 minus the pustule count at Baseline.

A nodule is a slightly elevated lesion on or in the skin. Change from basline in nodule count at Weeks 2, 4, 8, and 12 was calculated as the nodule count at Week 2/4/8/12 value (s) minus the nodule count at Baseline.

An open comedone is a yellow or blackish bump or plug on the skin. Change from Baseline in open comedone count at Weeks 2, 4, 8, and 12 was calculated as the open comedone count at Week 2/4/8/12 minus the open comedone count at Baseline.

A closed comedone is a whitehead. Change from basline in closed comedone count at Weeks 2, 4, 8, and 12 was calculated as the closed comedone count at Week 2/4/8/12 minus the closed comedone count at Baseline.

The DLQI was used to measure how much the participants' skin problem had affected their life over the last week. The DLQI total score ranges from 0 to 30: 0-1=no effect at all on the participant's life; 2-5=small effect on the participant's life; 6-10=moderate effect on the participant's life; 11-20=very large effect on the participant's life; 21-30=extremely large effect on the participant's life. A lower score on the DLQI indicates increased quality of life; therefore, negative changes from Baseline indicate improvements.

The CDLQI was used to measure how much the participants' skin problem had affected their life over the last week. The CDLQI total score ranges from 0 to 30: 0-1=no effect at all on the participant's life; 2-6=small effect on the participant's life; 7-12=moderate effect on the participant's life; 13-18=very large effect on the participant's life; 19-30=extremely large effect on the participant's life. A lower score on the CDLQI indicates increased quality of life; therefore, negative changes from Baseline indicate improvements.

Erythema is a skin condition characterized by redness or rash. Local tolerability assessments were performed by the Investigator at each study visit and were graded based on severity as G0 to G4: G0=absent (no redness); G1=slight (faint red or pink coloration, barely perceptible); G2=mild (light red or pink coloration); G3=moderate (medium red coloration); G4=severe (beet red coloration). Maximum During Treatment is defined as the maximum severity of erythema reported at any time during treatment.

Dryness=skin epidermis that lacks moisture/sebum. Local tolerability assessments were performed by the Investigator at each study visit and were graded based on severity as G0 to G4. G0=absent (none); G1=slight (barely perceptible dryness with no flakes or fissure formation); G2=mild (easily perceptible dryness with no flakes or fissure formation); G3=moderate (easily noted dryness and flakes but no fissure formation); G4=severe (easily noted dryness with flakes and fissure formation). Maximum During Treatment is defined as the maximum severity of dryness reported at any time during treatment.

Peeling skin: damage to and loss of the upper layer of skin (epidermis). Local tolerability assessments for peeling were performed by the Investigator at each study visit and were graded based on severity as G0 to G4: G0=absent (no peeling); G1=slight (mild localized peeling); G2=mild (mild and diffuse peeling); G3=moderate (moderate and diffuse peeling); G4=severe (moderate to prominent, dense peeling). Maximum During Treatment is defined as the maximum severity of peeling reported at any time during treatment.

Itching is a sensation that causes the desire or reflex to scratch. Local tolerability assessments for itching were performed by the participant at each study visit and were graded based on severity as G0 to G3. G0=none; G1=slight; G2=moderate; G3=strong. Maximum During Treatment is defined as the maximum severity of itching reported at any time during treatment.

Burning/stinging is a pain and burning sensation. Local tolerability assessments were performed by the participant at each study visit based on severity as G0 to G3: G0=none; G1=slight; G2=moderate; G3=strong. Maximum During Treatment is defined as the maximum severity of burning/stinging reported at any time during treatment.