Secondary service connection
Sleep apnea secondary to a knee condition: BVA grant rates and what wins
From 2018 to 2026, the Board of Veterans' Appeals decided sleep apnea claimed as secondary to a knee condition in 1,072 decisions. It granted the issue in 46.5% of them, above the 26.7% grant rate for all sleep apnea issues, denied it in 9.4%, and remanded it in 43.5%. Counting only decisions on the merits, 83.1% were granted.
Decisions
1,072
2018–2026
Granted
46.5%
All sleep apnea: 26.7%
Granted on the merits
83.1%
Granted ÷ (granted + denied)
Remanded
43.5%
Denied: 9.4%
See all sleep apnea decisions, direct and secondary.
Sleep apnea secondary to a knee condition: outcomes by year
| Year | Decisions | Granted | Denied | Remanded |
|---|---|---|---|---|
| 2018 | 33 | 36.4% | 18.2% | 45.5% |
| 2019 | 71 | 32.4% | 14.1% | 52.1% |
| 2020 | 77 | 36.4% | 11.7% | 51.9% |
| 2021 | 78 | 24.4% | 6.4% | 69.2% |
| 2022 | 73 | 23.3% | 16.4% | 57.5% |
| 2023 | 110 | 42.7% | 10.0% | 46.4% |
| 2024 | 237 | 51.5% | 6.8% | 41.4% |
| 2025 | 319 | 59.9% | 8.8% | 30.7% |
| 2026 | 74 | 52.7% | 5.4% | 41.9% |
Evidence in granted and denied sleep apnea decisions
For each kind of supporting evidence: how often the Board granted the sleep apnea issue on the merits when the decision mentioned it, compared with decisions that did not. These are associations, not causes, and evidence is recorded per decision, not per issue.
| In the record | Decisions | Granted when present | When absent | Difference |
|---|---|---|---|---|
| Positive nexus opinion | 545 | 95.1% | 41.8% | +53.3 pts |
| Private medical opinion | 689 | 88.8% | 51.6% | +37.1 pts |
| Favorable VA exam | 87 | 89.0% | 82.3% | +6.7 pts |
| Buddy statement | 48 | 72.0% | 83.6% | −11.6 pts |
| Lay statement | 753 | 78.3% | 94.4% | −16.2 pts |
- The Board applied the benefit-of-the-doubt rule (38 CFR 3.102) in 71.9% of the decisions that granted sleep apnea.
- The Board found the veteran's statements credible in 17.1% of grants and 9.9% of denials.
Negative evidence in the record
An unfavorable exam or a negative nexus opinion often sits in the same record as favorable evidence, and the Board weighs them against each other. So these rows show how often sleep apnea was still granted when the record contained the negative item, not that the item helped.
| In the record | Decisions | Granted when present | When absent | Difference |
|---|---|---|---|---|
| Negative nexus opinion | 779 | 80.9% | 90.6% | −9.8 pts |
| Unfavorable VA exam | 862 | 80.8% | 93.6% | −12.8 pts |
Why the Board granted or denied sleep apnea
Most common reasons in grants
- Caused by the service-connected disability118
- Service connection established68
- Current diagnosis established45
- Aggravated by the service-connected disability22
- VA examiner: less likely than not related to service11
- Obesity as intermediate step6
- Private medical opinion found probative4
- Conflicting medical opinions regarding nexus4
Most common reasons in denials
- VA examiner: less likely than not related to service19
- No in-service complaints, treatment or diagnosis14
- Caused by the service-connected disability12
- Service records negative or silent12
- Aggravated by the service-connected disability6
- Preponderance of the evidence against the claim6
- Current diagnosis established4
- Service connection established4
Numbers are decisions that gave the reason. Reasons are short phrases extracted by AI from each decision; common wordings of the same reason are grouped. Benefit of the doubt is reported above.
Recent sleep apnea decisions
Granted
Private medical opinion linked weight gain to service-connected knee/ankle conditions; Weight gain identified as intermediate step to OSA; Evidence in relative equipoise, doubt resolved in Veteran's favor
Favorable opinions found knee disability aggravated obesity, which caused sleep apnea.; Negative opinions did not adequately address obesity as an intermediate step.; Evidence found in equipoise, with doubt resolved in veteran's favor.
Sleep apnea rated under DC 6847 for use of CPAP machine.; Spicer v. McDonough precedent applied to secondary service connection.; Board resolved reasonable doubt in Veteran's favor for 50% rating.
Denied
Conflicting medical opinions regarding OSA etiology.; Board found VA examiners' opinions more probative than private opinion.; Lack of in-service documentation of OSA symptoms.; Significant delay between service and diagnosis.; OSA has a known etiology, precluding presumptive service connection as MUCMI.
No evidence of current disability; No nexus to service or service-connected disability; No pre-decisional duty to order VA exam; No evidence submitted for secondary claim
November 2023 VA exam found OSA not directly related to service, noting lack of in-service complaints and suggesting post-service factors.; Examiner noted Veteran's assertion of weight gain from knee injury causing OSA but cited other weight management options.; December 2023 VA exam found OSA unrelated to knee disability due to separate medical mechanisms and lack of supporting literature.; July 2024 VA exam found OSA unrelated to knee disability or obesity, citing multifactorial causes and passage of time since service.; Board found VA opinions adequate, considering Veteran's contentions but ultimately finding no basis for nexus.
Rules that apply to secondary sleep apnea claims
- 38 CFR 3.310
Secondary service connection and aggravation
Read it in VA Law Explorer - M21-1 V.ii.2.D
Secondary service connection and aggravation of non-service-connected disabilities
Read it in VA Law Explorer - 38 CFR 3.102
Reasonable doubt (benefit of the doubt)
Read it in VA Law Explorer - 38 CFR 4.97 · DC 6847
Schedule of ratings: respiratory system
Read it in VA Law Explorer - M21-1 IV.i.3.B.1.l
Reviewing a sleep disorders examination
Read it in VA Law Explorer
Research your sleep apnea case
Narrow by year, judge, evidence or secondary condition, read the decisions, and export a research memo.
How these numbers are calculated
- Counts decisions in which the Board decided a sleep apnea issue claimed as secondary to a knee condition, by the outcome of that issue.
- The primary disability is read from the decision text ("secondary to …") and grouped by name, so spellings such as "PTSD" and "posttraumatic stress disorder" count together.
- Secondary claims also include aggravation of a non-service-connected condition by a service-connected one (38 CFR 3.310(b)).
- The data comes from CaseScribe's AI extraction of public BVA decisions (2018–2026) and can contain errors. It is updated automatically as new decisions are added.