Exploratory analyses revealed that participants who completed the series on-time were more likely to be older ( OR = 1.15 , 95 % CI 1.01-1 .31 ) , report having completed a four-year college degree or more ( age-adjusted OR = 2.51 , 95 % CI 1.29-4 .90 ) , and report three or more lifetime sexual partners ( age-adjusted OR = 3.45 , 95 % CI 1.20-9 .92 ) .