Indiana Infant Mortality Report
1990 - 2003

Table 33. Infant mortality rates by selected characteristics among whites: Lake County, Indiana, 1990-1994 and 1999-2003 linked files
  Rate per 1,000
live births1		 Percent change
Characteristics 1990-1994 1999-2003 1990-1994 to 1999-2003
         
Total 8.3 6.6 -21.0  
         
Sex        
     Male 10.1 8.0 -21.0 **
     Female 6.3 5.0 -21.7 **
         
Plurality        
     Single births 7.8 6.0 -22.6  
     Multiple births * * ---  
         
Birth weight        
     Less than 2,500 grams 88.1 54.1 -38.6  
         Less than 1,500 grams 347.3 249.1 -28.3 **
         1,500-2,499 grams 32.1 * ---  
     2,500 grams or more 3.2 2.6 -18.8 **
         
Gestational age        
     Less than 37 weeks 49.9 35.1 -29.6  
         Less than 32 weeks 216.3 175.8 -18.7 **
         32-36 weeks 16.1 8.4 -48.0 **
     37 weeks or more 3.5 2.6 -27.3 **
         
Age of mother        
     Under 20 years 11.3 * ---  
         Under 18 years * * ---  
         18-19 years * * ---  
     20 years and over 7.9 6.4 -19.6 **
         20-24 years 9.1 6.5 -28.3 **
         25-29 years 6.7 7.1 5.5 **
         30-34 years 6.8 5.9 -13.8 **
         35 years and over 11.7 * ---  
         
Age/Education, years        
    <20, less than appropriate for age * * ---  
    <20, appropriate for age 10.0 * ---  
    20+, <12 years of education 11.4 7.0 -38.3 **
    20+, 12 years of education 8.3 8.3 -0.6 **
    20+, 13+ years of education 6.5 4.8 -26.3 **
         
Educational attainment        
     Less than 12 years 11.5 7.8 -32.2 **
         0-8 years * * ---  
         9-11 years 8.5 8.5 0.0 **
     12 years 8.5 7.8 -8.0 **
     More than 12 years 6.4 5.0 -22.1 **
         13-15 years 5.3 4.8 -10.1 **
         16 years and over 8.0 5.2 -34.9 **
         
Live-birth order        
     First 6.4 6.3 -1.3 **
     Second 9.0 6.0 -33.6 **
     Third 9.5 7.1 -25.3 **
     Fourth+ 11.4 * ---  
         
Marital status        
     Married 6.9 5.4 -21.1 **
     Unmarried 12.3 8.8 -28.6 **
         
Trimester prenatal care began        
     First trimester 7.5 5.6 -24.5  
     After first trimester 7.8 6.2 -20.8 **
         Second trimester 7.7 * --- **
         Third trimester * * ---  
     No care * * ---  
         
Prenatal care index2        
     Adequate Plus 12.9 7.6 -41.5  
     Adequate 3.9 4.2 6.9 **
     Intermediate * * ---  
     Inadequate 9.3 * ---  
     No care * * ---  
         
Maternal smoking        
     Smoking 10.9 8.9 -18.3 **
     Non-smoking 7.2 6.1 -16.0 **
1The total number of infant deaths and live births used in calculating the mortality rates is derived by summation of the respective yearly numbers presented in Table C-3 of Appendix C.
2Based on APNCU Index (Kotelchuck, M., Am J Public Health 1994;84:1414-1420).
**Not significant at p<0.05.
---Not applicable.
Source: Indiana State Department of Health, Epidemiology Resource Center