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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