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. 2018 Nov;108(11):1558-1565.
doi: 10.2105/AJPH.2018.304676. Epub 2018 Sep 25.

Trends in Pelvic Inflammatory Disease Among American Indian and Alaska Native Women, Indian Health Service, 2001-2015

Andria Apostolou  1 , Christina Chapman  1 , Marissa Person  1 , Kristen Kreisel  1 , Jeffrey McCollum  1
Affiliations

Trends in Pelvic Inflammatory Disease Among American Indian and Alaska Native Women, Indian Health Service, 2001-2015

Andria Apostolou et al. Am J Public Health. 2018 Nov.

Abstract

Objectives: To describe trends in rates of pelvic inflammatory disease (PID) encounters among American Indian/Alaska Native (AI/AN) women aged 15 to 44 years in the United States receiving care within the Indian Health Service (IHS).

Methods: We analyzed IHS discharge data sets for PID encounters during 2001 to 2015 with International Classification of Diseases, Ninth Revision, Clinical Modification, diagnosis codes. We calculated rates of PID encounters per 100 000 women overall and stratified by age group, region, and health care setting. We used regression to identify trends in the total, annual, and average annual percent changes in the rate of PID encounters.

Results: There were 44 042 PID encounters during 2001 to 2015 (rate = 825 per 100 000). The highest rates were among women aged 20 to 24 years (1104) and from the Alaska region (1556). Rates significantly decreased overall (2001: 1084; 2015: 512; P < .001) and within all age groups and health care settings. There was variability in Alaska, with large increases during 2001 to 2010 followed by large decreases during 2010 to 2015.

Conclusions: We observed decreasing trends in PID encounters among AI/AN women aged 15 to 44 years during 2001 to 2015, with the exception of increases in the Alaska region.

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Figures

FIGURE 1—
FIGURE 1—
Trends and Significance for Annual Ratesa of Encounters With a Pelvic Inflammatory Disease (PID) Diagnosisb Among American Indian/Alaska Native (AI/AN) Women Aged 15 to 44 Years by (A) Age Group and (B) Region: United States, Indian Health Service (IHS), Fiscal Years 2001 Through 2015 Note. Except for the line for Alaska in part b, all lines indicate a statistically significant trend test at P < .05. aAnnual rate is calculated per 100 000 AI/AN women aged 15 to 44 years for the corresponding IHS use population for each stratified group. bPelvic inflammatory disease is defined by codes 098.10, 098.16, 098.17, 098.19, 098.86, 099.56, 614.0, 614.2, 614.3, 614.5, 614.8, 614.9, 615.0, and 615.9 in any of 15 diagnosis slots. Encounter is defined as any inpatient, outpatient, or emergency department visit.
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