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Interpretation of Incidence Rates Data

Incidence Rate Report for Massachusetts by County

All Races (includes Hispanic), Female, Melanoma of the Skin, 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 18.5 with a 95% confidence interval from 17.9 to 19.1.
    • Average Annual Count : The count is 717.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : falling falling trend
    • Recent AAPC : -4.1
    US (SEER+NPCR)1,10
    • Rate : The incidence rate is 15.8 with a 95% confidence interval from 15.7 to 15.9.
    • Average Annual Count : The count is 26,903 §.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0.3
    Hampden County6,10
    • Rate : The incidence rate is 12.7 with a 95% confidence interval from 10.8 to 14.8.
    • Average Annual Count : The count is 36.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0.4
    Worcester County6,10
    • Rate : The incidence rate is 13.2 with a 95% confidence interval from 11.7 to 14.8.
    • Average Annual Count : The count is 60.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -5.9
    Suffolk County6,10
    • Rate : The incidence rate is 14.1 with a 95% confidence interval from 12.4 to 16.0.
    • Average Annual Count : The count is 54.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : falling falling trend
    • Recent AAPC : -11.7
    Franklin County6,10
    • Rate : The incidence rate is 15.1 with a 95% confidence interval from 10.1 to 21.9.
    • Average Annual Count : The count is 6.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 6.4
    Bristol County6,10
    • Rate : The incidence rate is 15.2 with a 95% confidence interval from 13.3 to 17.2.
    • Average Annual Count : The count is 50.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : 1.3
    Hampshire County6,10
    • Rate : The incidence rate is 15.3 with a 95% confidence interval from 11.8 to 19.6.
    • Average Annual Count : The count is 14.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -3.3
    Middlesex County6,10
    • Rate : The incidence rate is 17.8 with a 95% confidence interval from 16.5 to 19.1.
    • Average Annual Count : The count is 154.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -5.4
    Essex County6,10
    • Rate : The incidence rate is 19.3 with a 95% confidence interval from 17.5 to 21.3.
    • Average Annual Count : The count is 87.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -0.7
    Berkshire County6,10
    • Rate : The incidence rate is 23.3 with a 95% confidence interval from 18.8 to 28.6.
    • Average Annual Count : The count is 21.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -5.3
    Norfolk County6,10
    • Rate : The incidence rate is 23.6 with a 95% confidence interval from 21.5 to 25.9.
    • Average Annual Count : The count is 99.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -4.3
    Plymouth County6,10
    • Rate : The incidence rate is 24.8 with a 95% confidence interval from 22.2 to 27.6.
    • Average Annual Count : The count is 72.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -1.8
    Barnstable County6,10
    • Rate : The incidence rate is 31.7 with a 95% confidence interval from 27.7 to 36.3.
    • Average Annual Count : The count is 57.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : stable stable trend
    • Recent AAPC : -7.1
    Nantucket County6,10
    • Rate : The incidence rate is 63.6 with a 95% confidence interval from 36.7 to 103.2.
    • Average Annual Count : The count is 3.
    • Rate Period : The period for the rate is 2007-2011.
    • Recent Trend : rising rising trend
    • Recent AAPC : 46.7
    Dukes County6,10
    • Rate : *
    • Average Annual Count : *
    • Rate Period : *
    • Recent Trend : *
    • Recent AAPC : *


    Notes:
    Created by statecancerprofiles.cancer.gov on 09/23/2014 6:25 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.
    * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 cases were reported in a specific area-sex-race category.

    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.