Statewide Tables from the 2006 Maternal and Infant Health Assessment (MIHA) survey
MO-07-0127 MIHA
Introduction to the MIHA Survey and Explanation of Terms
The California Maternal and Infant Health Assessment (MIHA) is an annual, statewide-representative survey of women who recently gave birth to a live infant. It is completed via the mail, with telephone follow-up to non-respondents. MIHA is administered in English and Spanish only.
The MIHA survey data are linked to birth certificate information and weighted to reflect sampling design. The sample is stratified by race, education and region* (PDF)
within California; African-American women are oversampled. There were too few American Indian women in the study to examine them separately. Age, parity and region* (PDF)of residence came from birth certificate information linked to MIHA, and were are not asked in MIHA. All other variables were taken from the MIHA responses. The numbers reported are unweighted, but the percents are weighted. Weighted percents take into account the sample stratification and the oversampling. Some measures had too small a number (unweighted numerator < 10) to calculate a stable, representative percentage and are indicated by an asterisk (*) only. 95% CI represents "95% Confidence Interval," which means that these two values will include the true population value in 95 out of 100 random samples that might be drawn from the population. However, please remember that this survey is self-administered, which may affect some answers. Thus, one should not expect estimates from the MIHA survey to be identical to surveys that collect data through in-person interview or telephone call.
*The sampled regions include all California counties, assigned in the following way:
Central Coast Area: Counties of Monterey, San Benito, San Luis Obispo, Santa Barbara, Santa Cruz, Ventura
Greater Sacramento Area: Counties of El Dorado, Placer, Sacramento, Sutter, Yolo, Yuba
Los Angeles County
Northern/Mountain Areas: Counties of Alpine, Amador, Butte, Calaveras, Colusa, Del Norte, Glenn, Humboldt, Inyo, Lake, Lassen, Mariposa, Mendocino, Modoc, Mono, Nevada, Plumas, Shasta, Sierra, Siskiyou, Tehama, Trinity, Tuolumne
Orange County
San Diego County
San Francisco Bay Area: Counties of Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, Sonoma
San Joaquin Valley: Counties of Fresno, Kern, Kings, Madera, Merced, San Joaquin, Stanislaus, Tulare
Southeastern California: Counties of Imperial, Riverside, San Bernardino
A. Before Pregnancy
B. During Pregnancy
C. After Birth
D. Characteristics of Women in MIHA