Double-Blinded, Vehicle-Controlled Proof of Concept Study to Investigate the Recurrence of Inflammatory and Noninflammatory Acne Lesions Using Tretinoin Gel (Microsphere) 0.04% in Male Patients after Oral Isotretinoin Use

Table 6

Mean lesion counts.

Lesion	Baseline	Week 4	Week 8	Week 16	Week 24
Active (95% CI)	0 (0, 0.369)	0.5 (0, 0.467)	2.1 (0.024, 0.722)	2.1 (0.024, 0.722)	1.2 (0.003, 0.557)
Vehicle (95% CI)	0 (0, 0.369)	1.9 (0.011, 0.642)	2.6 (0.042, 0.801)	2.7 (0.042, 0.801)	3.1 (0.062, 0.877)