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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2018 Jan 30;27(4):446–453. doi: 10.1158/1055-9965.EPI-17-0009

Table 2.

Baseline characteristics stratified by having at least one false positive result, recall breast imaging or biopsy not yielding breast cancer, on screening mammography. Know Your Risk: Assessment at Screening (KYRAS) study (N=2019), New York, NY (November 2014–October 2015)

Characteristic
N=2019
Had a False Positive Result
N=1075 (53.2%)
Never Had a False Positive Result
N=944 (46.8%)
p-value
Age, years 0.0442
 Less than 50 years old 226 (21.0) 234 (24.8)
 50 years or older 849 (79.0) 710 (75.2)
Race/ethnicity 0.3431
 Hispanic 837 (77.9) 705 (74.7)
 Non-Hispanic white 105 (9.8) 99 (10.5)
 Non-Hispanic black 93 (8.7) 101 (10.7)
 Other 40 (3.7) 39 (4.1)
Body mass index, kg/m2 0.0455
 Underweight (<18.5) 18 (1.7) 13 (1.4)
 Normal weight (18.5–24.9) 308 (28.7) 254 (26.9)
 Overweight (25–29.9) 405 (37.7) 319 (33.8)
 Obese (≥30) 344 (32.0) 358 (37.9)
Frequency of screening* <0.0001
 Annual 836 (77.8) 563 (59.6)
 Biennial 139 (12.9) 196 (20.8)
 Every 3+ years 69 (6.4) 137 (14.5)
 First mammogram 31 (2.9) 48 (5.1)
Breast density** 0.0002
 Low breast density 712 (66.2) 698 (73.9)
 High breast density 363 (33.8) 246 (26.1)
Breast cancer risk status*** 0.0583
 Low or average risk 791 (73.6) 729 (77.2)
 High risk 284 (26.4) 215 (22.8)
*

Yearly screening frequency was determined as a median of 9 to 18 months between screening mammograms. Biennial screening frequency was determined as a median of >18 to 30 months between screening mammograms. Every 3+ years was determined as greater than a median of 30 months between screening mammograms.

**

Breast density was dichotomized as low [almost entirely fatty (<25% density) or scattered areas of fibroglandular density (25–50%)] or high [heterogeneously dense (51–75%) or “extremely dense” (>75%)]

***

High breast cancer risk status for breast cancer was determined as having greater than 1.66% 5-year risk or 20% lifetime risk based upon the Gail model or a score of 6 or greater on the modified Six-Point Scale, which indicates eligibility for BRCA genetic testing.