Pap Smear and STI Screening: Different Age Cutoffs
Pap smear screening stops at age 65 years (with adequate prior screening), but STI screening for chlamydia and gonorrhea does NOT stop at age 65—it continues based on sexual activity and risk factors, not age alone. 1, 2, 3
Cervical Cancer Screening (Pap Smear) Cessation
Women should discontinue Pap smear screening after age 65 years if they meet specific criteria:
- 3 consecutive negative cytology tests OR 2 consecutive negative cotest results within the prior 10 years
- Most recent test must be within the last 5 years
- Once discontinued, screening should NOT resume for any reason, including new sexual partners 1, 2, 1
Important exceptions where screening continues beyond age 65:
- History of CIN2, CIN3, or adenocarcinoma in situ (continue for at least 20 years after treatment, even past age 65)
- History of cervical cancer
- Immunocompromised status (HIV, organ transplant, chronic corticosteroids)
- In utero DES exposure
- Inadequate prior screening history 1, 2
STI Screening for Chlamydia/Gonorrhea: Age-Independent
STI screening recommendations are NOT tied to age 65 or Pap smear cessation. The screening paradigm is fundamentally different:
Current CDC and USPSTF Recommendations:
For women:
- Universal annual screening for sexually active women under age 25 years
- Risk-based screening for women age 25 years and older with risk factors:
- New or multiple sexual partners
- Partner with concurrent partners
- History of STI
- Inconsistent condom use 3
No upper age limit is specified—screening continues as long as risk factors are present, regardless of whether the woman is 30,50,65, or 80 years old.
Key Risk Factors Warranting Continued STI Screening (Any Age):
- Sexually active with new partner(s)
- Multiple sexual partners
- Partner with known STI or at high risk
- Inconsistent barrier protection
- Commercial sex work
- Injection drug use 3
Critical Clinical Pitfall
The 2012 change to less frequent Pap screening inadvertently reduced STI screening rates in young women because clinicians historically performed both tests during the same visit. Studies from Ontario showed:
- 25.5% reduction in chlamydia testing among 15-19 year olds
- 16.8% decrease in reported chlamydia cases in this age group
- Disproportionate impact on highest-risk populations 4, 5
Solution: Decouple STI screening from Pap smear visits. Screen based on sexual activity and risk factors, not cervical cancer screening schedule. Use urine NAAT testing which doesn't require pelvic examination 4.
Practical Algorithm
For women age 65+ years:
- Stop Pap smears if adequate prior screening (see criteria above)
- Continue STI screening if:
- Sexually active with new partner since last test
- Multiple partners
- Partner at high risk
- Any other risk factors listed above
For women age 25-64 years:
- Pap smears every 3-5 years (depending on method)
- STI screening annually if age <25 OR if risk factors present at any age
The evidence is clear: cervical cancer screening has an age-based stopping point, but STI screening does not—it follows risk, not age 3.