Abstract
Background: Cervical cancer is the second leading cancer among Thai women. Human papillomavirus (HPV) is the most common cause of cervical cancer. HPV16 and HPV18 are the most prevalence types in women with cervical cancer.
 Objectives: To study the prevalence and types of HPV infection and its associated risk factors among women with abnormal cervical cytology screening.
 Methods: This cross-sectional study purposively recruited 376 women who had abnormal cervical cytology screening by liquid-based cytology at the outpatient clinic, Ramathibodi Hospital from August 2015 until March 2016. HPV genotyping was done by the polymerase chain reaction (PCR). Analysis of the personal characteristics was done using descriptive statistics.
 Results: The prevalence of HPV infection was 41.5%. Among them, a single infection was found in 78.8% of women. The most common genotypes were HPV16 (8.5%) and HPV52 (7.7%). But HPV18 was found in only 1.9%. The characteristic which was significantly associated with HPV infection was age, nulliparity, and high-graded dysplasia (P < .05).
 Conclusions: High prevalence rate of HPV infection was found among women with abnormal cytology. High-risk HPV prevalence and type distribution may be useful for public health authorities in assessing the cervical screening program.
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