Table 2

Associations of grooming practices with self-reported histories of individual STIs and individual types of STIs in a nationally representative US probability sample, 2013

Non-groomers, n (%)Groomers, n (%)Non-extreme groomers, n (%)Extreme groomers, n (%)Low-frequency groomers, n (%)High-frequency groomers, n (%)
19535517p Value*4558922p Value*†42921196p Value*‡
History of any STI159 (8)784 (14)<0.01618 (14)163 (18)<0.01611 (14)172 (15)0.92
History of cutaneous STIs:
 Any cutaneous  STI§46 (2)356 (7)<0.01265 (6)88 (10)<0.01261 (6)95 (8)0.02
 Herpes20 (1)142 (3)<0.01105 (2)36 (4)0.01107 (3)35 (3)0.40
 HPV¶14 (1)182 (3)<0.01126 (3)55 (6)<0.01127 (3)55 (5)0.01
 Syphilis14 (0.7)69 (1.3)0.0559 (1)10 (1)0.6056 (1)13 (1)0.55
 Molluscum contagiosum2 (0.1)6 (0.1)0.945 (0.1)0 (0)0.314 (0.1)2 (0.2)0.49
History of secretory STIs:
 Any secretory STI§97 (5)441 (8)<0.01353 (8)88 (10)0.07356 (8)84 (7)0.15
 Gonorrhoea62 (3)215 (4)0.15189 (4)26 (3)0.06188 (4)27 (2)<0.01
 Chlamydia46 (2)286 (5)<0.01214 (5)72 (8)<0.01221 (5)64 (5)0.78
 HIV3 (0.2)28 (0.5)0.0425 (1)3 (0.3)0.3922 (1)6 (0.5)0.96
History of other STIs:
 Lice34 (2)162 (3)0.01143 (3)19 (2)0.08142 (3)20 (2)<0.01
  • Extreme grooming—removal of all pubic hair more than 11 times per year. High-frequency grooming—hair trimming daily or weekly.

  • *Calculated by χ2 or Fisher's exact test.

  • †Compares extreme with non-extreme groomers.

  • ‡Compares high-frequency groomers with low-frequency groomers.

  • §Any of the subcategorised independent STIs.

  • ¶ HPV includes HPV, vaginal and anal warts.

  • HPV, human papillomavirus.