My husband asked me if having a male teacher correlated to more procrastination than having a female teacher. Well, beats me. I wasn't particularly interested in gender for this study. All three instructors in my study are male. I don't see any reason to expect that this would be a problem for the study, but I suppose someone could conduct a study to answer my husband's question. I could imagine certain teaching methods that encourage or discourage procrastination might actually correlate somewhat to gender, but it doesn't strike me as something that would make an obvious impact.
He also asked if the gender distribution of the class contributed to the amount of procrastination. Again, beats me. I didn't collect any data about the students' gender. I didn't even ask the students to report their genders on the questionnaires. I haven't tried to guess students' genders in assigning them pseudonyms.