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Table 1 Characteristics of the M-HOC college-age cohort and stratification by HPV vaccination status and gender

From: HPV vaccination has not increased sexual activity or accelerated sexual debut in a college-aged cohort of men and women

  Full Cohort Vaccinated Unvaccinated   Female Male  
Variable N Value N Value N Value p-valuea N Value N Value p-valuea
Age 241 18.9 (1.0) 158 18.8 (1.0) 59 19.1 (1.0) 0.09 168 18.8 (1.0) 73 19.0 (1.1) 0.17
Female 241 70% (168) 158 74% (117) 59 66% (39) 0.25 168 100% (168) 73 0% (0)
Race 241   158   59   168   73  
 White   54% (131)   56% (88)   61% (36)    56% (94)   52% (37)  
 Asian   31% (74)   30% (47)   24% (14)    29% (49)   35% (25)  
 Black   6% (14)   4% (7)   8% (5)    5% (9)   7% (5)  
 Other/multiracial   8% (20)   9% (14)   7% (4)    10% (16)   6% (4)  
Vaccinated 217 73% (158) 158 100% (153) 59 0% (0) 156 75% (117) 61 67% (41) 0.25
Age at first vaccine dose 102 15.5 (2.4) 79 15.0 (2.5) 22 16.7 (1.6) <0.001
Current smoker 231 1% (2) 158 1% (1) 59 2% (1) 168 0% (0) 73 3% (2)
Alcohol: current user 231 65% (157) 158 68% (104) 59 63% (35) 0.49 168 65% (109) 73 66% (48) 0.90
Alcohol: ever binge drinkerb 231 15% (37) 158 16% (25) 59 15% (9) 0.92 168 11% (19) 73 25% (18) 0.01
Marijuana: ever user 231 38% (91) 158 37% (58) 59 41% (24) 0.59 168 36% (60) 73 42% (31) 0.32
Has had any sex 231 63% (151) 158 64% (101) 59 61% (36) 0.69 168 62% (104) 73 64% (47) 0.71
If has had sex, has had
 Vaginal 151 77% (116) 101 77% (78) 36 75% (27) 0.79 104 78% (81) 47 74% (35) 0.70
 Oral 151 96% (145) 101 97% (93) 36 94% (31) 104 97% (101) 47 94% (44)
 Anal 151 20% (30) 101 21% (21) 36 22% (8) 0.86 104 17% (18) 47 26% (12) 0.24
Lifetime number of sexual partners
 Any 241 2.2 (3.7) 158 2.7 (4.2) 59 1.9 (2.7) 0.15 168 2.1 (3.2) 73 2.8 (4.6) 0.24
 Vaginal sex 241 1.6 (3.1) 158 1.9 (3.5) 59 1.2 (2.3) 0.09 168 1.7 (2.9) 73 1.4 (3.6) 0.58
 Oral sex 241 2.3 (3.6) 158 2.7 (4.1) 59 1.8 (2.7) 0.09 168 2.1 (3.0) 73 2.7 (4.7) 0.34
 Anal sex 241 0.2 (0.8) 158 0.3 (0.8) 59 0.2 (0.6) 0.64 168 0.1 (0.5) 73 0.4 (1.2) 0.08
 Age at sexual debut 150 16.6 (1.7) 101 16.5 (1.7) 36 16.9 (1.8) 0.18 104 16.7 (1.6) 46 16.5 (1.9) 0.58
 Uses protection during vaginal sex 114   78   26   81   33  
 Always   47% (54)   41% (32)   62% (16)    46% (37)   52% (17)  
 Most of the time   32% (37)   37% (29)   23% (6)    33% (27)   30% (10)  
 Sometimes   9% (10)   8% (6)   8% (2)    11% (9)   2% (1)  
 Rarely   6% (7)   9% (7)   0% (0)    5% (4)   9% (3)  
 Never   5% (6)   5% (4)   8% (2)    5% (4)   6% (2)  
 Uses protection during oral sex 139   96   31   96   43  
 Always   1% (1)   1% (1)   0% (0)    1% (1)   0% (0)  
 Most of the time   0% (0)   0% (0)   0% (0)    0% (0)   0% (0)  
 Sometimes   4% (5)   4% (4)   3% (1)    4% (4)   2% (1)  
 Rarely   8% (11)   9% (10)   0% (0)    10% (10)   2% (1)  
 Never   88% (122)   84% (81)   97% (30)    84% (81)   95% (41)  
 Uses protection during anal sex 30   21   8   18   12  
 Always   33% (10)   29% (6)   50% (4)    28% (5)   42% (5)  
 Most of the time   17% (5)   14% (3)   13% (1)    17% (3)   17% (2)  
 Sometimes   7% (2)   10% (2)   0% (0)    11% (2)   0% (0)  
 Rarely   3% (1)   5% (1)   0% (0)    0% (0)   8% (1)  
 Never   40% (12)   43% (9)   38% (3)    44% (8)   33% (4)  
  1. Values are % (number) out of N or age/number (sd). Only 217 of the 241 participants indicated vaccination status. Because participants could choose to not answer questions, sums of categorical entries may not equal the corresponding N. The M-HOC (Michigan HPV and Oropharyngeal Cancer) study was conducted in 2015–17 in Ann Arbor, MI
  2. a: p-value for difference in means between vaccinated and unvaccinated populations, given by t-test (continuous or integer) or chi-square (binary and categorical). Boldface indicate p < 0.05
  3. b: Habitual consumption of at least 6–9 drinks in a sitting