Number of procedures per 1,000 women, 16–55 years
The number of operations for endometriosis increased from 1,272 to 2,431 in the period from 2015 to 2024. This represents an increase of 91 per cent. The median age of those operated on, aged 16 to 55, was 42 years in 2024.
There is considerable geographical variation in surgeries for endometriosis. In 2024, the area with the highest rate had four times as many surgeries as the area with the lowest rate. The catchment area for Vestfold Hospital Trust consistently had a high rate throughout the period, and the highest rate from 2019 onwards. The catchment areas for Førde and Nord-Trøndelag Hospital Trusts consistently had low rates during the same period.
The proportion of surgeries involving hysterectomy remained at around 40% from 2019 to 2024. In 2024, hysterectomy was performed in more than half of the surgeries for endometriosis in the catchment areas for Vestfold (61%), Telemark (56%), Nord-Trøndelag (56%), UNN (54%), and St. Olav (54%). In contrast, the proportion of hysterectomies was significantly lower in the catchment areas for Førde (17%), Lovisenberg (21%), OUS (21%), and Diakonhjemmet (23%).
The number of surgeries performed at private hospitals has been low, ranging from none in the first three years from 2015, to an average of 11 per year over the past four years.
The analysis is based on activity data from the Norwegian Patient Register (NPR) for somatic specialist health services. The data includes activity in public hospitals and private hospitals that provide publicly funded services. Data from specialists under public funding contracts are not included, as this treatment is only provided in hospitals.
The sample consists of women aged 16-55 years registered with a primary or secondary diagnosis of N80, N941, N944, N945 or N946 in combination with one or more of the following procedure codes: LCD00, LCD30, LCD96, LCD10, LCD40, LCD01, LCD04, LCD11, LCD31, LCD97, LCC10, LCC11, LCC20, JAL21, JAL24, JAP00, JAP01, JAL20, JAL21, JAA10, JAA11, LAC00, LAC01, LAC10, LAC11, LAC20, LAC21, LCF00, LCF01, LAD00, LAD01, LAE10, LAE11, LAE20, LAE21, LAF00, LAF01, LAF10, LAF11, LAF20, LAF30, LBD00, LBD01, LBE00, LBE01, LCC00, LCC01, LCC05, LCC96, LCC97, LCF97 or LCF96.
Hysterectomy is defined by one or more of the following procedure codes: LCD00, LCD30, LCD96, LCD10, LCD40, LCD01, LCD04, LCD11, LCD31, LCD97, LCC10, LCC11, or LCC20, and the remaining procedure codes are defined as other interventions.
The place of treatment is divided into three categories:
In order to compare the catchment areas and between years, the rates have been adjusted for gender and age. The adjustment was done using the direct method with the population in 2023 as the reference population.
SKDE is solely responsible for the interpretation and presentation of the data provided by NPR. FHI/NPR is not responsible for analyses or interpretations based on the data.
All of the data used in the charts for this analysis can be downloaded as a CSV file.
