Characteristics of the Content of NHMN

Breast cancer is a significant problem in New Hampshire (NH), with higher mortality rates than the national average for this disease. Thankfully, our state benefits from a population-based mammography registry, the New Hampshire Mammography Network (NHMN), which was implemented in 1996. The NHMN efficiently obtains demographic, risk factor, and radiologic data on approximately 90% of women having mammography in NH, and then links mammographic encounter information to breast pathology outcomes. Several studies have been conducted using the NHMN.

Characteristics of the Contents of the NHMN (Time period 5/96- 8/03)

Characteristics 609,413 mammograms; 244,202 women
Number of Mammography Facilities 28
Percent Screening Mammograms 87
Percent Diagnostic Mammograms 13
Mean number of screening mammograms done/year/facility (95% CI) 2,075 (1,816, 2,333)
Mean number of diagnostic mammograms done/year/facility (95% CI) 320 (269, 371)
Percent of Women in Each Ethnic Category
Caucasian 97.1
Asian 0.5
African American 0.4
Native American 0.5
Hispanic 0.6
Other 0.4
Multi-racial 0.5
Percent of Women in Each Age Category
< 40 2.5
40-49 24.7
50-59 29.9
60-69 18.6
70-79 14.0
>80 10.4