Table 1.

Characteristics of the study sample at baseline in the Ludwig-McGill Cohort Study (n = 505)

VariablesCategoriesn (%) a
Age (years)18–2262 (12.3)
22–29121 (24.0)
30–39186 (36.8)
≥40136 (26.9)
EthnicityWhite318 (63.0)
Nonwhite187 (37.0)
Education<Elementary125 (24.8)
Elementary301 (59.6)
High school68 (13.5)
College/University9 (1.8)
SmokingNever245 (48.5)
Current172 (34.1)
Former88 (17.4)
Number of pregnancies0–180 (15.8)
2–3225 (44.6)
4–6147 (29.1)
≥750 (9.9)
Oral contraceptive useNever85 (16.8)
<6 years261 (51.7)
≥6 years159 (31.5)
Condom useNo185 (36.6)
Yes320 (63.4)
Hygienic tampon useNo454 (89.9)
Yes50 (9.9)
Menstrual cloth useNo313 (62.0)
Yes191 (37.8)
Vaginal douchingNever/occasional475 (94.1)
Frequent30 (5.9)
Age at first intercourse20–50142 (28.1)
18–19113 (22.4)
16–17113 (22.4)
Embedded Image 15137 (27.1)
Lifetime number of sex partners0–1238 (47.1)
2–3176 (34.9)
4+91 (18.0)
Number of sex partners in the last 5 years0–1410 (81.2)
≥295 (18.8)
Number of sex partners in the last year0–1483 (95.6)
≥218 (3.6)
Anal sex practiced between visitsNo301 (59.6)
Yes204 (40.4)
Lifetime number of anal sex partners0319 (63.2)
1172 (34.1)
2–314 (2.8)
Received oral sexNever239 (47.3)
Ever266 (52.7)
Annual frequency of masturbation acts in the last 5 yearsb0351 (69.5)
<192 (18.2)
1–927 (5.3)
10–3519 (3.8)
≥3616 (3.2)
History of sexually transmitted diseasesNo384 (76.0)
HPV-related20 (4.0)
Other100 (19.8)
Cytology gradecNILM471 (93.3)
ASC-US16 (3.2)
LSIL13 (2.6)
HSIL3 (0.6)
  • Abbreviations: HSIL, high squamous intraepithelial lesion; NILM, negative for intraepithelial lesion or malignancy

  • aFrequencies may not add up to 505 women because of missing values for some variables.

  • bQuestion asked at the follow-up visit. Of those practicing masturbation, 147 reported using hands and 6 using objects (1 missing).

  • cRefers to the highest cytologic grade attained during the first year.