Casual Contraception in Casual Sex
Results for Subsamples by whether the Partner Attends the Same College

Table 1. Selected Odds Ratios for Equation 2-3, Estimated for Events in which the Partner Attended the Respondent's College
Models Estimating the Odds of Coitus Models Estimating the Odds of Condom Use
Equation 2 Equation 3 Equation 2 Equation 3
WomenMenWomenMenWomenMenWomenMen
*** p < .001 ** p < .01 * p < .05 ^ p < .1
Year of College
Freshman Year
Sophomore Year1.121.59***0.56***0.60*
Junior Year1.57***1.64***0.69*0.59^
Senior Year1.74***2.15***0.60**0.51*
During/After Freshman Year
First Year of College
Years 2/3/4 of College1.301.070.26**0.32^
Mother's Educational Attainment
Mother Received a High School Education or Less
Mother Received Some College Education0.910.960.980.670.800.770.580.29^
Mother Received a Bachelor's Degree0.870.970.990.710.63*0.830.37*0.78
Mother Received a Graduate Degree0.870.860.930.51**0.62*0.650.29**0.22*
Grade × Mother's Educational Attainment
Years 2/3/4 × Some College0.891.71^1.453.40^
Years 2/3/4 × Bachelor's Degree0.811.61^1.901.06
Years 2/3/4 × Graduate Degree0.942.15*2.81*3.85^
School Gender Composition
≤ 53% Female
≥ 53% Female0.881.120.862.00
≥ 53% Female × Years 2/3/41.64***1.071.68^0.74
Observations429421074294210713757841375784
Table 2. Selected Odds Ratios for Equation 2-3, Estimated for Events in which the Partner Did Not Attend the Respondent's College
Models Estimating the Odds of Coitus Models Estimating the Odds of Condom Use
Equation 2 Equation 3 Equation 2 Equation 3
WomenMenWomenMenWomenMenWomenMen
*** p < .001 ** p < .01 * p < .05 ^ p < .1
Year of College
Freshman Year
Sophomore Year1.31*1.240.860.68
Junior Year1.68***1.270.820.74
Senior Year2.00***2.31***0.73^0.91
During/After Freshman Year
First Year of College
Years 2/3/4 of College1.321.76^0.800.43
Mother's Educational Attainment
Mother Received a High School Education or Less
Mother Received Some College Education0.78*0.810.66^0.740.940.980.930.74
Mother Received a Bachelor's Degree0.74**0.950.781.070.981.020.960.51
Mother Received a Graduate Degree0.80^0.62*0.770.921.110.740.630.39
Grade × Mother's Educational Attainment
Years 2/3/4 × Some College1.231.041.041.42
Years 2/3/4 × Bachelor's Degree0.910.811.002.48
Years 2/3/4 × Graduate Degree1.040.572.09^2.33
School Gender Composition
≤ 53% Female
≥ 53% Female1.000.971.410.86
≥ 53% Female × Years 2/3/41.39^1.010.741.08
Observations2778967277896711994481199448