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Get More BHC Data

Data presented in the Health Profiles are just the tip of the iceberg. Additional estimates are available upon request.
 

​Frequently Asked Questions (FAQs) About the Building Healthy Communities (BHC) Data

1.  Who was surveyed?
2.  How many interviews were completed in my BHC site?
3.  What do these data represent?
4.  How can these data be used?
5.  What is a 95% Confidence Interval (95% CI)?
6.  What do the significance tests mean?
7.  What is an unstable estimate?
8.  What is the suggested citation for referencing the BHC Health Profiles?
9. How do I get more data?

1. Who was surveyed?

Both the eligibility criteria and the sampling method for the BHC oversample differed between 2009 and 2015

​CHIS 2009 ​CHIS 2015
​Households in each BHC site were randomly selected to participate through random digit dial (RDD) telephone sampling. ​Households in each BHC site were randomply selected to participate by phone through address-based sampling (ABS).

​Eligible residents included:

  • Young adults (age 40 and younger).
  • Parents of children age 18 and younger.
  • Teens (age 12 to 17).
  • Children (age 0 to 11).

​Eligible residents included:

  • Adults (age 18 and over).
  • Teens (age 12 to 17).
  • Children (age 0 to 11).

 

 

2. How many interviews were completed in my BHC site?

​BHC Community ​ ​BHC 2009 ​ ​ ​ BHC 2015​ ​ ​ ​
​Adults Teens​ Children​ Total​ Adults​ Teens​ Children​ Total​
Boyle Heights​ ​333 64​ 172​ ​569 ​314 ​29 71​ 414​
​Central Santa Ana ​330 ​62 ​213 ​605 ​256 ​23 ​60 ​339
​Central/SE/SW Fresno ​331 ​62 ​189 ​582 ​255 ​17 ​41 ​313
​Central/West Long Beach ​323 ​53 ​183 ​559 ​260 ​20 ​62 ​342
​City Heights ​296 ​59 ​182 ​537 ​264 ​18 ​40 ​322
​Del Norte County ​373 ​86 ​204 ​663 ​311 ​36 ​81 ​428
​Eastern Coachella Valley ​301 ​73 ​194 ​568 ​359 ​21 ​39 ​419
​East Oakland ​345 ​64 ​203 ​612 ​254 ​14 ​37 ​305
​East Salinas ​328 ​56 ​236 ​620 ​227 ​16 ​62 ​305
​Richmond ​306 ​59 ​279 ​544 ​205 ​8 ​22 ​235
​South Kern (Arvin-Lamont) ​368 ​84 ​286 ​738 ​203 ​22 ​46 ​271
​South Los Angeles ​360 ​78 ​171 ​609 ​262 ​25 ​50 ​337
​SW/East Merced County ​331 ​68 ​181 ​580 ​258 ​12 ​37 ​307
​South Sacramento ​349 ​75 ​191 ​615 ​199 ​12 ​30 ​241

 

3. What do these data represent?

Estimates are representative of the eligible population living in each BHC site, which is different between 2009 and 2015. For example, the proportion of adults ever diagnosed with asthma in 2009 represents the estimated proportion of adults ever diagnosed with asthma that are age 18-40 or age 40+ and living with a child at or below the age of 18. In 2015, it represents the estimated proportion of adults ever diagnosed with asthma that are at or above the age of 18. Comparable estimates were produced for the same eligible population for each BHC's county and the state.

4. How can the health profiles be used?

Information in the health profiles is invaluable to community health. It can be used to identify community needs, inform policies, offer evidence for advocacy, and to motivate individual and community-wide health behaviors.

5. What is a 95% Confidence Interval (95% CI)?

Each estimate for BHC sites also includes a 95% confidence interval (CI). The confidence interval provides a range in which the "true" proportion lies. One may interpret the confidence interval as statint that we are 95% confident that the actual point estimate lies somewhere within the range of the confidence interval. Wide confidence intervals are often indicative of uncertainty surrounding that estimate and could be the result of small sample sizes. Estimates with wide confidence intervals should be interpreted with caution.

6. What do the significance tests mean?

County and state estimates in each profile are marked with an "*" if they are significantly different from the BHC site estimate. In statistics, significance testing is performed to determine whether the relationship between two or more variables is caused by something other than random chance.

7. What is an unstable estimate?

The coefficient of variation (CV) is a measure of confidence in the ability of an estimate to adequately represent and describe a population. CV ranges from 0 to 1, and a lower CV indicates a more precise estimate. In the BHC health profiles, estimates with a CV greater than 0.3 are denoted as unstable (marked with a "†") and should be interpreted with caution.

8. What is the suggested citation for referencing the BHC health profiles?

BHC 2009 Citation:
2009 California Health Interview Survey. Building Healthy Communities Health Profiles. Los Angeles, CA: UCLA Center for Health Policy Research and The California Endowment, 2012. Retrieved from www.healthpolicy.ucla.edu/bhc.

BHC 2015 Citation:
2015 California Health Interview Survey. Building Healthy Communities Health Profiles. Los Angeles, CA: UCLA Center for Health Policy Research and The California Endowment, 2017. Retrieved from www.healthpolicy.ucla.edu/bhc.

 

9. How do I get more data?

The BHC CHIS data are rich and intended to be used by the BHC sites. Health Profiles provide estimates for only a subset of CHIS data. If you are interested in obtaining additional data about your BHC site, please contact your BHC site program manager, or the TCE Evaluation Manager, Mona Jhawar, at mjhawar@calendow.org. You can also contact the UCLA Center for Health Policy Research Data Access Center (DAC) at dacchpr@ucla.edu.