Safe infant sleep statistics combine mortality surveillance with surveys of what caregivers report doing. The measures below distinguish SUID from SIDS, describe the population and period behind each figure, and separate observed practice from observational association or derived estimate.
Key Safe Infant Sleep Statistics
The most useful headline figures include:
- In the United States, about 3,400 infants younger than 1 year die suddenly and unexpectedly each year, according to an annual estimate cited in a 2026 report.
- In 31 U.S. registry jurisdictions, 4,861 qualifying SUIDs occurred during 2020–2024.
- Among those registry SUIDs, 66% involved infants aged 0–3 months during 2020–2024.
- In the United States, 1,445 infant deaths were classified as SIDS in 2023, equal to 40.2 deaths per 100,000 live births.
- The U.S. infant sleep-related death rate fell from 154.6 to 93.9 deaths per 100,000 live births between 1990 and 1999.
- In the 15-state PRAMS trend analysis, nonsupine positioning declined from 27.2% in 2009 to 19.4% in 2015.
- In 29 U.S. states in 2016, 78.0% of mothers reported usually placing infants on their backs.
- In pooled U.S. PRAMS data for 2016–2022, supine-sleep adherence was 79.8%.
- In 29 U.S. states in 2016, 57.1% of mothers reported room-sharing without bed-sharing.
- In the 2011–2014 U.S. SAFE survey, 20.7% of mothers reported bed-sharing as the usual sleep location.
- In the 2020–2024 CDC registry, soft bedding was present in 78% of SUID sleep environments.
- In that registry, unsafe sleep factors were identified in 73% of SUIDs, or 3,548 of 4,861 cases.
- In PRAMS 2016–2022, safe-bedding adherence was 32.8%, the lowest of four measured practices.
- Provider advice was associated with a 28% higher adjusted prevalence of reported back sleeping in the 2016 PRAMS analysis.
- A pooled case-control analysis estimated 0.08 SIDS deaths per 1,000 live births with room-sharing and 0.23 per 1,000 with bed-sharing in a selected low-risk subgroup.
- A pacifier meta-analysis estimated one SIDS death could be prevented for every 2,733 infants using a pacifier when placed for sleep.
Contents
- Safe infant sleep statistics: SUID and SIDS scale
- Back-sleep and safe sleep position trends
- Room-sharing, bed-sharing and sleep-surface data
- Soft bedding, obstruction and unsafe sleep outcomes
- Safe sleep adoption, advice and disparities
- Breastfeeding, pacifiers and measured factors
Safe Infant Sleep Statistics: The Scale of SUID and SIDS
SUID is a broader classification than SIDS. It includes SIDS, accidental suffocation or strangulation in bed, and deaths with unknown causes, so the terms should not be treated as interchangeable.
The CDC’s 2020–2024 registry provides a detailed but partial picture:
- The registry included 4,861 qualifying SUIDs in 31 U.S. jurisdictions.
- 57% were male infants, while Black infants accounted for 38% and White infants for 37% of registry SUIDs.
- 74% involved infants born at 37 or more weeks’ gestation, and Medicaid-insured infants represented 69% of cases.
- 66% involved infants aged 0–3 months.
These are distributions among deaths, not population-specific risks. The registry jurisdictions do not represent every U.S. death; the CDC report says the registry captures about two in five U.S. SUIDs. CDC, Characteristics of Sudden Unexpected Infant Deaths — United States, 2020–2024
| Measure | Period and geography | Result |
|---|---|---|
| Annual sudden unexpected infant deaths | Annual estimate cited in 2026 report, United States | About 3,400 infants under 1 year |
| SIDS classification | 2023, United States | 1,445 deaths; 40.2 per 100,000 live births |
| Combined infant sleep-related death rate | 1990–1999, United States | 154.6 to 93.9 per 100,000 live births |
| Combined infant sleep-related death rate | 2015, United States | 92.6 per 100,000 live births |
The 2023 SIDS figure uses the ICD-10 SIDS cause-of-death classification and is narrower than SUID. The combined sleep-related measure includes SIDS, accidental suffocation or strangulation in bed, and unknown causes. CDC, Vital Signs: Trends and Disparities in Infant Safe Sleep Practices — United States, 2009–2015
Back-Sleep and Safe Infant Sleep Position Trends
Back sleeping is commonly reported as a usual practice, but survey figures are not direct observation of every sleep episode. PRAMS asks mothers about the position used most often.
- In 2015, 21.6% of postpartum respondents in 32 states and New York City reported nonsupine positioning. State estimates ranged from 12.2% in Wisconsin to 33.8% in Louisiana.
- Across the 15-state trend analysis, nonsupine positioning declined from 27.2% in 2009 to 19.4% in 2015.
- In 2016, 78.0% of mothers in 29 states reported usually placing infants on their backs.
- Provider advice about back-sleep position was reported by 92.6% of mothers in that 2016 analysis, and advice was associated with a 28% higher adjusted prevalence of reported back sleeping (APR 1.28; 95% CI 1.21–1.35).
The 2016 state-level difference in safe-sleep practice prevalence was about 20–25 percentage points, spanning four practices and states rather than representing one national gap for one behavior. Prevalence and Factors Associated With Safe Infant Sleep Practices
| Position measure | Period | Population | Result |
|---|---|---|---|
| Nonsupine positioning | 2015 | 32 states and New York City | 21.6% |
| Nonsupine positioning | 2015 | Wisconsin to Louisiana | 12.2%–33.8% |
| Usually back sleeping | 2016 | 29 U.S. states | 78.0% |
| Supine-sleep adherence | 2016–2022 pooled | U.S. PRAMS Phase 8 | 79.8% (95% CI 79.4%–80.2%) |
Supine-sleep adherence improved at an average annual percentage change of 0.7% during 2016–2022. This APC summarizes a fitted trend and is not a percentage-point increase. Maternal adherence to safe infant sleep recommendations in the USA: trends and disparities from PRAMS 2016–2022
Room-Sharing, Bed-Sharing and Sleep-Surface Data
Room-sharing without bed-sharing, bed-sharing, and use of a separate approved surface are different measures. Results also vary by survey wording, reference period, country, and whether mothers reported the usual arrangement.
- In 2016 PRAMS across 29 U.S. states, 57.1% reported room-sharing without bed-sharing, while 31.8% reported using a separate approved surface such as a crib, bassinet, or play yard.
- Provider advice about room-sharing without bed-sharing was reported by 48.8% of mothers and was associated with a 12% higher adjusted prevalence of that arrangement (APR 1.12; 95% CI 1.09–1.16).
- In the 2011–2014 U.S. SAFE survey of mothers at 32 birth hospitals, 65.5% usually room-shared without bed-sharing and 20.7% reported bed-sharing as the usual sleep location.
The SAFE survey found that 58.2% of exclusively breastfeeding mothers and 70.0% of non-breastfeeding mothers usually room-shared without bed-sharing. These subgroup comparisons are observational and may reflect demographic or behavioral differences. Infant Sleep Location and Breastfeeding Practices in the United States: 2011–2014
A Swedish Western-region cohort offers a separate geography and should not be read as a U.S. estimate. At three months in the 2018 cohort, 54% slept in a separate cot in the parents’ room; at six months, 33% bed-shared versus 20% in the 2003–2004 comparison cohort, based on differing cohorts and questionnaire participation.
Pooled case-control evidence from the United Kingdom, Europe, and Australasia found bed-sharing during the last sleep in 22.2% of SIDS cases versus 9.6% of controls. The pooled adjusted odds ratio for SIDS was 2.7 across all ages, while a selected subgroup of infants younger than three months with nonsmoking parents, breastfeeding, and no other risk factors had an adjusted odds ratio of 5.1 (95% CI 2.3–11.4) for bed-sharing versus room-sharing. Bed sharing when parents do not smoke: is there a risk of SIDS?
In that selected subgroup, estimated absolute SIDS risk was 0.08 per 1,000 live births for room-sharing and 0.23 per 1,000 for bed-sharing. These are model-based estimates from case-control evidence, not randomized effects.
Soft Bedding, Airway Obstruction and Unsafe Sleep Outcomes
CDC registry environment measures describe circumstances among deaths and are not risk rates among all living infants. Factors can overlap, so the percentages below should not be added together.
- Among 2020–2024 registry SUIDs, 46% were found in a nonsupine position.
- Soft bedding was present in 78% of registry SUID sleep environments, including blankets, sheets, pillows, cushions, and other soft objects.
- Full airway obstruction was documented in 28% of registry SUIDs.
- Unsafe sleep factors were identified in 73% of cases, or 3,548 of 4,861.
Among 919 SUIDs classified as explained suffocation with unsafe sleep factors, soft bedding was the attributed mechanism in 74%, overlay in 24%, and wedging in 8%. Overlay means airway obstruction by a person or animal; wedging means trapping between two inanimate objects.
The registry classified 44% of all SUIDs as unexplained with unsafe sleep factors and 10% as unexplained possible suffocation with unsafe sleep factors. These algorithmic categories reflect incomplete evidence and are not interchangeable with a medical cause. CDC, Characteristics of Sudden Unexpected Infant Deaths — United States, 2020–2024
Earlier survey data measured reported exposure to soft bedding:
- In 2015, 38.5% of respondents in 13 states and New York City reported using some soft bedding.
- In the 2007–2010 National Infant Sleep Position Study, more than 54% reported placing infants to sleep with soft bedding during the prior two weeks.
The definitions and sampling differ, so these survey figures should not be treated as a single continuous trend. CDC, Vital Signs: Trends and Disparities in Infant Safe Sleep Practices — United States, 2009–2015
Safe Infant Sleep Adoption, Advice and Disparities
Advice receipt and reported adherence are separate outcomes. In 2016 PRAMS, provider advice prevalence ranged from 48.8% for room-sharing without bed-sharing to 92.6% for back sleep.
The same study found adjusted associations between advice and practice: advice was associated with a 12% higher prevalence of room-sharing without bed-sharing and a 28% higher prevalence of reported back sleeping. These are observational associations, not intervention effect sizes, and residual confounding or reporting bias may remain. Prevalence and Factors Associated With Safe Infant Sleep Practices
Reported sociodemographic and state-level differences were roughly 10–20 percentage points for practices, compared with about 5–10 points for receipt of advice. The ranges summarize multiple comparisons rather than one single disparity.
Pooled PRAMS Phase 8 data for 2016–2022 show different adoption levels across four defined practices:
| Defined practice | 2016–2022 result or trend | Scope |
|---|---|---|
| Supine-sleep adherence | 79.8% (95% CI 79.4%–80.2%); APC 0.7% | U.S. PRAMS |
| Safe-bedding adherence | 32.8% (95% CI 32.4%–33.2%); APC 11.2% | U.S. PRAMS |
| Safe-surface adherence | APC 2.7% | U.S. PRAMS |
| Safe-location adherence | APC 0.6% | Room-sharing without bed-sharing |
Safe-bedding adherence was the lowest of the four measured practices at 32.8%. APC values are fitted relative trends, not percentage-point changes or proof that a specific program caused improvement. Maternal adherence to safe infant sleep recommendations in the USA: trends and disparities from PRAMS 2016–2022
Breastfeeding, Pacifiers and Other Measured Safe-Sleep Factors
Breastfeeding appears in safe-sleep research as a measured co-occurring practice, but associations do not show that one behavior causes another. In the SAFE survey, 30.5% of mothers reported exclusive breastfeeding and 29.5% partial breastfeeding; bed-sharing mothers had adjusted odds of 2.46 for exclusive breastfeeding versus mothers who room-shared without bed-sharing (95% CI 1.76–3.45).
The Swedish 2018 cohort found bed-sharing positively associated with breastfeeding at three months, with odds ratios ranging from 1.5 to 2.8. The study was observational, and the range reflected breastfeeding definitions or comparisons in the report. Infant Sleep Location and Breastfeeding Practices in the United States: 2011–2014
Pacifier evidence is also derived primarily from observational studies:
- A meta-analysis estimated that one SIDS death could be prevented for every 2,733 infants using a pacifier when placed for sleep (95% CI 2,416–3,334), using a U.S.-based rate calculation.
- A 2008 systematic review summarized prior case-control meta-analyses as suggesting up to a 61% reduction in SIDS risk with pacifier use at sleep initiation.
The number-needed-to-treat estimate depends on the U.S. SIDS rate and a pooled observational odds ratio; it is not a randomized trial result. The 61% figure is a maximum reported relative reduction from international case-control evidence, not a guaranteed individual reduction. Do pacifiers reduce the risk of sudden infant death syndrome? A meta-analysis
An England case-control study of 325 babies who died and 1,300 controls reported additional sleep-location associations. Sharing a sofa had an odds ratio of 48.99 (95% CI 5.04–475.60), sleeping in a separate room from parents had an odds ratio of 10.49 (95% CI 4.26–25.81), and bed-sharing for the whole sleep or being found in the parental bed had an odds ratio of 9.78 (95% CI 4.02–23.83).
The same study reported an odds ratio of 0.67 (95% CI 0.22–2.00) for bed-sharing followed by return to the infant’s own cot. Because the confidence interval includes no association, this does not establish that the arrangement is protective; all estimates are study-specific observational results. Babies sleeping with parents: case-control study of factors influencing the risk of the sudden infant death syndrome