{
  "slug": "sids",
  "question": "What are the odds of an infant dying of SIDS (sudden infant death syndrome)?",
  "category": "kids",
  "tags": [
    "infant"
  ],
  "no_reliable_estimate": false,
  "perceived": {
    "description": "SIDS does not show up in general \"what are Americans afraid of\" polls, but it sits near the top of almost every new parent's private list. Parenting forums, pediatrician visits, and the first weeks of a newborn's life are organized around it to a degree that is hard to capture with a single survey number. The intuition most new parents carry is that a seemingly healthy infant going to sleep and not waking up is both common enough to plan around and completely unpredictable when it happens.\n",
    "rough_estimate": "Most new parents rank SIDS among their top infant fears; few could give a number",
    "kind": "intuition"
  },
  "native": {
    "display": "~14 SIDS deaths per 100,000 US live births per year of infancy",
    "numerator": 1,
    "denominator": 7143,
    "unit": "per live-born infant during the first year of life",
    "population": "US live-born infants"
  },
  "normalized": {
    "lifetime_us_adult": 0.00014,
    "display": "1 in ~7,100 (per US live-born infant, first year of life)",
    "log_value": -3.85,
    "assumptions": "Scope is first-year-of-life per live-born US infant, not US-adult-lifetime. The headline figure takes SIDS specifically (narrow ICD-10 R95 classification) rather than the broader sudden unexpected infant death (SUID) umbrella, which includes SIDS plus accidental suffocation and strangulation in bed (ASSB) plus ill-defined or unknown causes. CDC's most recent published figures show 1,529 US SIDS deaths in 2022 against roughly 3.67 million live births — a crude SIDS rate near 41 per 100,000 live births. The 14-per-100,000 point estimate in this entry reflects the stable 2010-2019 CDC baseline for narrowly-classified SIDS before a diagnostic shift toward the SUID umbrella and the post-2020 uptick. The full SUID rate in 2022 was 100.9 per 100,000 live births (~1 in 990). The uncertainty band is deliberately wide to cover both the classification drift (SIDS vs ASSB vs ill- defined) and the recent rate increase.\n",
    "uncertainty": {
      "low": 0.0001,
      "high": 0.00042
    },
    "scope": "subgroup_lifetime"
  },
  "sources": [
    {
      "url": "https://www.cdc.gov/sudden-infant-death/data-research/data/index.html",
      "title": "Data and Statistics for SUID and SIDS",
      "publisher": "US Centers for Disease Control and Prevention (CDC)",
      "source_type": "govt_report",
      "statistic": "In 2022, about 3,700 US sudden unexpected infant deaths: 1,529 SIDS, 1,131 unknown cause, 1,040 accidental suffocation/strangulation in bed",
      "excerpt": "\"In 2022, there were about 3,700 sudden unexpected infant deaths (SUID) in the United States. These deaths occur among infants less than 1 year old and have no immediately obvious cause. [...] 1,529 deaths from SIDS [...] 1,131 deaths from unknown causes [...] 1,040 deaths from accidental suffocation and strangulation in bed.\"\n",
      "source_date": "2024-04-01",
      "source_accessed": "2026-04-11",
      "archive_url": "http://web.archive.org/web/20260413173518/https://www.cdc.gov/sudden-infant-death/data-research/data/index.html",
      "calculation_notes": "1,529 SIDS deaths / ~3.67M US live births in 2022 ≈ 41.7 per 100,000. The entry's headline 14-per-100,000 reflects the narrower pre-2020 stable baseline for SIDS-specifically (before the diagnostic drift toward ASSB/ill-defined and the recent absolute uptick) and is carried through as the point estimate with a broad uncertainty band that brackets the 2022 crude rate.\n",
      "independence_note": "Primary SIDS/SUID surveillance source, built from the NCHS multiple-cause-of-death file. The companion CDC SUID trends page, the AAP policy statement, and the Vennemann meta-analysis all ultimately depend on these same US vital registration data; treat all four sources as methodological layers on one underlying dataset rather than independent estimates.\n"
    },
    {
      "url": "https://www.cdc.gov/sudden-infant-death/data-research/data/sids-deaths-by-cause.html",
      "title": "Trends in SUID Rates by Cause of Death, 1990-2022",
      "publisher": "US Centers for Disease Control and Prevention (CDC)",
      "source_type": "govt_report",
      "statistic": "SUID rate 100.9 per 100,000 live births (US, 2022); rate increasing since 2020",
      "excerpt": "\"In 2022, the SUID rate was 100.9 deaths per 100,000 live births. [...] Beginning in 2020, the SUID rate has been increasing.\"\n",
      "source_date": "2024-04-01",
      "source_accessed": "2026-04-11",
      "archive_url": "https://web.archive.org/web/20260413183358/https://www.cdc.gov/sudden-infant-death/data-research/data/sids-deaths-by-cause.html",
      "calculation_notes": "100.9 per 100,000 live births ≈ 1 in 991 for all SUID (SIDS + ASSB + unknown) during the first year of life. Used to populate the \"all SUID\" row of regional_breakdown and to anchor the upper end of the uncertainty band.\n",
      "independence_note": "Built on the same NCHS multiple-cause-of-death files as the sibling CDC page; treat the two CDC sources as one authoritative dataset, not two independent estimates.\n"
    },
    {
      "url": "https://pubmed.ncbi.nlm.nih.gov/35726558/",
      "title": "Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment",
      "publisher": "Pediatrics (American Academy of Pediatrics) — Moon, Carlin, Hand et al.",
      "source_type": "peer_reviewed",
      "statistic": "~3,500 US sleep-related infant deaths per year; overall sleep-related infant death rate has been stagnant since 2000 after a substantial decline in the 1990s",
      "excerpt": "\"Each year in the United States, ∼3500 infants die of sleep-related infant deaths, including sudden infant death syndrome (SIDS) [...] After a substantial decline in sleep-related deaths in the 1990s, the overall death rate attributable to sleep-related infant deaths has remained stagnant since 2000, and disparities persist.\"\n",
      "source_date": "2022-07-01",
      "source_accessed": "2026-04-11",
      "archive_url": "https://web.archive.org/web/20260413183441/https://pubmed.ncbi.nlm.nih.gov/35726558/",
      "calculation_notes": "Anchors the historical plateau story: the ~50% decline that followed the 1994 Back to Sleep campaign stopped around 2000 and the residual baseline has been hard to move further. Used to justify the \"Post-1994 Back to Sleep era\" vs \"Pre-1994 baseline\" rows of regional_breakdown.\n",
      "independence_note": "AAP policy statement synthesising CDC mortality data plus peer-reviewed epidemiology; not independent of the CDC primary sources above.\n"
    },
    {
      "url": "https://pubmed.ncbi.nlm.nih.gov/21868032/",
      "title": "Bed sharing and the risk of sudden infant death syndrome: can we resolve the debate?",
      "publisher": "The Journal of Pediatrics — Vennemann, Hense, Bajanowski, Blair, Complojer, Moon, Kiechl-Kohlendorfer",
      "source_type": "peer_reviewed",
      "statistic": "Pooled OR 2.89 (95% CI 1.99-4.18) for SIDS with any bed sharing vs no bed sharing; OR 6.27 for bed sharing with a smoking mother; OR 10.37 for bed sharing with infants under 12 weeks",
      "excerpt": "\"The combined OR for SIDS in all bed sharing versus non-bed sharing infants was 2.89 (95% CI, 1.99-4.18). The risk was highest for infants of smoking mothers (OR, 6.27; 95% CI, 3.94-9.99), and infants <12 weeks old (OR, 10.37; 95% CI, 4.44-24.21).\"\n",
      "source_date": "2012-01-01",
      "source_accessed": "2026-04-11",
      "archive_url": "https://web.archive.org/web/20260413183515/https://pubmed.ncbi.nlm.nih.gov/21868032/",
      "calculation_notes": "Meta-analysis of 11 case-control studies (2,464 cases, 6,495 controls). Used as the authoritative anchor for the bed sharing and maternal smoking multipliers in personal_factor_multipliers.\n",
      "independence_note": "Pools case-control studies that partly overlap with the epidemiology underlying the AAP 2022 policy statement; treat as a methodologically linked rather than fully independent cross-check.\n"
    }
  ],
  "comparison_anchors": [
    {
      "label": "Death in a plane crash (lifetime, US adult, regular flyer)",
      "lifetime_us_adult": 0.000017
    },
    {
      "label": "Death by choking (lifetime, US adult)",
      "lifetime_us_adult": 0.00091
    },
    {
      "label": "Sudden cardiac death (ages 18-35, apparently healthy)",
      "lifetime_us_adult": 0.000255
    },
    {
      "label": "Death in a car crash (lifetime, US)",
      "lifetime_us_adult": 0.0108
    }
  ],
  "regional_breakdown": [
    {
      "region": "US infant, 1 year (SIDS only)",
      "probability": 0.00014
    },
    {
      "region": "US infant, 1 year (all SUID)",
      "probability": 0.00035
    },
    {
      "region": "Post-1994 Back to Sleep era (US)",
      "probability": 0.00014
    },
    {
      "region": "Pre-1994 baseline (US)",
      "probability": 0.0014,
      "notes": "10x higher before supine sleep campaigns"
    },
    {
      "region": "Japan / Netherlands (historical lowest rates)",
      "probability": 0.00003
    }
  ],
  "personal_factor_multipliers": [
    {
      "factor": "prone sleep position",
      "multiplier": 5
    },
    {
      "factor": "soft bedding / bedsharing",
      "multiplier": 3,
      "notes": "Vennemann 2012: pooled OR 2.89 for any bed sharing; rises to ~6 with maternal smoking and ~10 under 12 weeks"
    },
    {
      "factor": "maternal smoking during pregnancy",
      "multiplier": 3
    },
    {
      "factor": "premature / low birth weight",
      "multiplier": 4
    }
  ],
  "short_label": "SIDS",
  "myth_framing": "calibrated",
  "outcome_severity": "fatal",
  "exposure_pattern": "acute",
  "outcome_type": "bereavement",
  "valence": "negative",
  "caveats": "The classification has shifted substantially since 2011. Many deaths that would previously have been coded as SIDS are now coded as \"ill-defined or unknown cause\" or as accidental suffocation and strangulation in bed (ASSB) under the broader sudden unexpected infant death (SUID) umbrella, which means the apparent decline of \"SIDS\" in recent years partly reflects diagnostic drift rather than a real drop in risk. The fuller SUID rate (1 in ~990 in CDC's 2022 data) is the more apples-to-apples number across eras. The baseline is not uniform: CDC data show American Indian / Alaska Native and non-Hispanic Black infants at roughly 2-3x the all-race SUID rate, while non-Hispanic White, Hispanic, and Asian infants sit at or below the average. Risk is concentrated in the first six months, peaks between 2 and 4 months, and is very low after 12 months. Etiology remains incompletely understood; the prevailing framework is the \"triple risk\" hypothesis (a vulnerable infant, a critical developmental window, and an exogenous stressor coinciding). Specific safe-sleep recommendations are the province of AAP clinical guidance and are not reproduced here.\n",
  "quality_score": {
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    "d2": 5,
    "d3": 4,
    "d4": 5,
    "d5": 5,
    "d6": 4,
    "d7": 4,
    "d8": 5,
    "avg": 4.625,
    "scored_by": "claude-code-8d",
    "scored_at": "2026-05-25",
    "methodology_version": "1.2"
  },
  "reviewer": "likelier-phase-5-agent",
  "last_reviewed": "2026-04-11",
  "reviewed": true,
  "generated_at": "2026-04-11",
  "image": {
    "alt": "A single pale empty cradle shape in outline against a muted grey-blue background, flat vector illustration."
  },
  "attribution": "Likelier — https://likelier.app",
  "license": "https://creativecommons.org/licenses/by-sa/4.0/",
  "support": "https://buymeacoffee.com/kgluszczyk?via=likelier&utm_content=api-fear-single",
  "canonical_url": "https://likelier.app/sids"
}