Pelvic inflammatory disease epidemiology and demographics

It is difficult to have an accurate estimate of PID incidence and prevalence because most of this patients are sub-clinical.^[1] PID is the most common reason for hospitalization among women. It is more common among young sexually active woman aged 15-29.

• It is estimated that between 750,000 and 1.2 million women are affected by PID each year in the United States.^[2][3]
• Incidence and prevalence are decreasing since 1985 because of widespread chlamydia screening and treatment.^[4]
• PID is the most common gynecologic reason for hospital admission in the United States, accounting for 18 per 10,000 recorded hospital discharges.^[5][6]
• Approximately 50,000 women become infertile in the US each year as a consequence of PID.
• N. gonorrhoea is isolated in only 40-60% of women with acute salpingitis.^[7] C. trachomatis was estimated to be the cause in about 60% of cases of salpingitis, which may lead to PID.

• 
  Pelvic Inflammatory Disease—Hospitalizations of Women Aged 15–44 Years, United States, 2001–2010
• 
  Pelvic Inflammatory Disease—Initial Visits to Physicians’ Offices by Women Aged 15–44 Years, United States, 2002–2011

Graphs adapted from https://www.cdc.gov/

PID is a common disease that tends to affect young women between the ages of 15 and 29 years.^[2]

In the United States, African-American or Black-Caribbean ethnicity has been associated with a higher risk of PID.^[8]

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