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Interpretation of Incidence Rates Data

Incidence Rate Report for Massachusetts by County

All Races (includes Hispanic), Female, Breast, All Ages
Sorted by Rate

Explanation of Column Headers

Incidence Rate (95% Confidence Interval) - The incidence rate is based upon 100,000 people and is an annual rate (or average annual rate) based on the time period indicated. Rates are age-adjusted by 5-year age groups to the 2000 U.S. standard million population.

Other Notes

  • Larger confidence intervals indicate less stability of the data. This is often due to low counts that are not quite low enough to be suppressed.
  • Data is currently being suppressed if there are fewer than 16 counts for the time period.


    Line by Line Interpretation of the Report


    Massachusetts6,10
    • Rate : The incidence rate is 135.6 with a 95% confidence interval from 133.9 to 137.2.
    • Average Annual Count : The count is 5,371.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0.7
    US (SEER+NPCR)1,10
    • Rate : The incidence rate is 122.7 with a 95% confidence interval from 122.4 to 122.9.
    • Average Annual Count : The count is 216,052 §.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0.4
    Berkshire County6,10
    • Rate : The incidence rate is 118.0 with a 95% confidence interval from 108.0 to 128.8.
    • Average Annual Count : The count is 113.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -5.3
    Bristol County6,10
    • Rate : The incidence rate is 122.4 with a 95% confidence interval from 117.1 to 127.9.
    • Average Annual Count : The count is 413.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 0.2
    Hampshire County6,10
    • Rate : The incidence rate is 126.0 with a 95% confidence interval from 115.7 to 137.1.
    • Average Annual Count : The count is 115.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -11
    Worcester County6,10
    • Rate : The incidence rate is 127.3 with a 95% confidence interval from 122.7 to 132.1.
    • Average Annual Count : The count is 592.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 1.9
    Suffolk County6,10
    • Rate : The incidence rate is 127.8 with a 95% confidence interval from 122.5 to 133.3.
    • Average Annual Count : The count is 446.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : falling falling trend
    • Recent AAPC : -3.2
    Hampden County6,10
    • Rate : The incidence rate is 129.3 with a 95% confidence interval from 123.3 to 135.5.
    • Average Annual Count : The count is 365.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 0
    Franklin County6,10
    • Rate : The incidence rate is 135.4 with a 95% confidence interval from 120.6 to 151.7.
    • Average Annual Count : The count is 66.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : falling falling trend
    • Recent AAPC : -9.2
    Essex County6,10
    • Rate : The incidence rate is 137.2 with a 95% confidence interval from 132.4 to 142.1.
    • Average Annual Count : The count is 641.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 0.9
    Middlesex County6,10
    • Rate : The incidence rate is 139.1 with a 95% confidence interval from 135.6 to 142.7.
    • Average Annual Count : The count is 1,234.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -1.6
    Plymouth County6,10
    • Rate : The incidence rate is 141.0 with a 95% confidence interval from 135.0 to 147.2.
    • Average Annual Count : The count is 435.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0.3
    Dukes County6,10
    • Rate : The incidence rate is 145.0 with a 95% confidence interval from 114.0 to 182.6.
    • Average Annual Count : The count is 16.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -3.3
    Norfolk County6,10
    • Rate : The incidence rate is 145.0 with a 95% confidence interval from 139.8 to 150.3.
    • Average Annual Count : The count is 619.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0
    Barnstable County6,10
    • Rate : The incidence rate is 161.6 with a 95% confidence interval from 152.9 to 170.7.
    • Average Annual Count : The count is 305.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 2.1
    Nantucket County6,10
    • Rate : The incidence rate is 179.4 with a 95% confidence interval from 132.9 to 237.5.
    • Average Annual Count : The count is 10.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 1.8


    Notes:
    Created by statecancerprofiles.cancer.gov on 10/20/2014 10:14 pm.
    Data for the United States does not include data from Nevada.
    State Cancer Registries may provide more current or more local data.
    † Incidence rates (cases per 100,000 population per year) are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84, 85+). Rates are for invasive cancer only (except for bladder cancer which is invasive and in situ) or unless otherwise specified. Rates calculated using SEER*Stat. Population counts for denominators are based on Census populations as modified by NCI. The 1969-2012 US Population Data File is used for SEER and NPCR incidence rates.
    § The total count for the US (SEER+NPCR) may differ from the summation of the individual states reported in this table. The total uses data from the CDC's National Program of Cancer Registries Cancer Surveillance System (NPCR-CSS) January 2013 data submission for the following states: California, Kentucky, Louisiana, and New Jersey but data for those states when shown individually are sourced from the SEER November 2013 submission.

    1 Source: CDC's National Program of Cancer Registries Cancer Surveillance System (NPCR-CSS) January 2014 data submission and SEER November 2013 submission.
    6 Source: State Cancer Registry and the CDC's National Program of Cancer Registries Cancer Surveillance System (NPCR-CSS) January 2014 data submission. State rates include rates from metropolitan areas funded by SEER.
    10 Source: Incidence data provided by the National Program of Cancer Registries (NPCR). EAPCs calculated by the National Cancer Institute using SEER*Stat. Rates are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84,85+). Rates are for invasive cancer only (except for bladder cancer which is invasive and in situ) or unless otherwise specified. Population counts for denominators are based on Census populations as modified by NCI. The 1969-2012 US Population Data File is used with NPCR January 2014 data.

    Please note that the data comes from different sources. Due to different years of data availablility, most of the trends are AAPCs based on APCs but some are EAPCs calculated in SEER*Stat. Please refer to the source for each graph for additional information.

    Interpret Rankings provides insight into interpreting cancer incidence statistics. When the population size for a denominator is small, the rates may be unstable. A rate is unstable when a small change in the numerator (e.g., only one or two additional cases) has a dramatic effect on the calculated rate.

    Suppression is used to avoid misinterpretation when rates are unstable.