Table 1 Changes in maternal and infant characteristics and SIDS rates, United States, 1995–96 and 2004-2005
From: Sudden infant death syndrome: a re-examination of temporal trends
Maternal/infant characteristics | 1995-96 | 2004-05 | Rate ratio | ||||||
|---|---|---|---|---|---|---|---|---|---|
Live births | SIDS | Live births | SIDS | ||||||
N | % | N | Rate per 1000 live births | N | % | N | Rate per 1000 live births | ||
Age (years) <20 | 868,673 | 13.2 | 1,429 | 1.65 | 736,649 | 10.4 | 792 | 1.08 | 0.65 (0.60-0.71) |
20-24 | 1,627,849 | 24.6 | 2,035 | 1.25 | 1,812,729 | 25.5 | 1,741 | 0.96 | 0.77 (0.72-0.82) |
25-29 | 1815,432 | 27.5 | 1,123 | 0.62 | 1,936,846 | 27.3 | 901 | 0.47 | 0.75 (0.69-0.82) |
30-34 | 1,527,046 | 23.1 | 685 | 0.45 | 1,634,468 | 23.0 | 415 | 0.25 | 0.57 (0.50-0.64) |
35-39 | 650,020 | 9.8 | 256 | 0.39 | 800,732 | 11.3 | 189 | 0.24 | 0.60 (0.50-0.72) |
40+ | 115,534 | 1.7 | 45 | 0.39 | 180,408 | 2.5 | 39 | 0.22 | 0.56 (0.36-0.85) |
Race: Non-Hispanic white | 4,307,044 | 65.2 | 3,152 | 0.73 | 4,223,756 | 59.5 | 2,323 | 0.55 | 0.75 (0.71-0.79) |
African American | 1,071,246 | 16.2 | 1,690 | 1.58 | 1,089,924 | 15.3 | 1,150 | 1.06 | 0.67 (0.62-0.72) |
Hispanic | 857,735 | 13.0 | 452 | 0.53 | 1,364,849 | 19.2 | 426 | 0.31 | 0.59 (0.52-0.68) |
Other/unknown | 368,529 | 5.6 | 134 | 0.36 | 423,303 | 6.0 | 83 | 0.20 | 0.54 (0.41-0.71) |
Education* < high school | 1,342,264 | 20.3 | 2262 | 1.69 | 1,445,734 | 20.4 | 1,468 | 1.02 | 0.60 (0.56-0.64) |
Smoking during pregnancy | 824,813 | 12.5 | 1894 | 2.30 | 707,215 | 10.0 | 1,372 | 1.94 | 0.84 (0.79-0.91) |
Single parent | 2,132,386 | 32.3 | 3235 | 1.52 | 2,592,271 | 36.5 | 2,561 | 0.99 | 0.65 (0.62-0.69) |
No prior live births | 2,742,409 | 41.5 | 1644 | 0.60 | 2,825,916 | 39.8 | 1,140 | 0.40 | 0.67 (0.62-0.73) |
Infant sex (male) | 3,379,795 | 51.2 | 3294 | 0.97 | 3,636,621 | 51.2 | 2,466 | 0.68 | 0.70 (0.66-0.73) |
Singleton infants | 6,436,128 | 97.4 | 5333 | 0.83 | 6,872,585 | 96.8 | 3,833 | 0.56 | 0.67 (0.65-0.70) |
Congenital anomalies* | 101,446 | 1.5 | 94 | 0.93 | 78,727 | 1.1 | 44 | 0.56 | 0.60 (0.42-0.86) |
Gestational age (weeks): | |||||||||
22-36 | 573,469 | 8.68 | 1,138 | 1.98 | 746,046 | 10.50 | 918 | 1.23 | 0.62 (0.57-0.68) |
≥37 | 6,031,085 | 91.32 | 4,435 | 0.74 | 6,355,786 | 89.50 | 3,159 | 0.50 | 0.68 (0.65-0.71) |
Total | 6,604,554 | 100.00 | 5,573 | 0.84 | 7,101,832 | 100.0 | 4077 | 0.57 | 0.68 (0.65-0.71) |