Knee: what evidence wins at the Board

For knee appeals, how often the Board granted the issue when the record held each kind of evidence, and how often when it did not. Measured from the decisions themselves; every number carries its fraction.

What this is computed from: evidence types detected in the full text of 1,907,778 public Board of Veterans' Appeals decisions (va.gov/vetapp), joined to the issue-level outcome. The tables use only single-issue decisions with a clean parse in complete crawl years (1993–2025) — 852,152 decisions — so each evidence flag attaches to exactly one decided issue. A split is shown only when both sides have at least 30 decisions. Data build: 2026-09-02.

Service connection for Knee (n = 16,723)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record61% (1,068/1,761)35% (3,464/9,777)+25 pts14% (278/2,047)
Private physician opinion, letter or DBQEvidence in the record52% (1,438/2,781)35% (3,094/8,757)+16 pts12% (396/3,200)
Disability Benefits Questionnaire in the recordEvidence in the record53% (212/397)39% (4,320/11,141)+15 pts36% (227/627)
Third-party lay statements (spouse, buddy, employer)Evidence in the record38% (338/894)39% (4,194/10,644)-2 pts15% (166/1,072)
Service treatment records document the condition or injuryEvidence in the record37% (2,401/6,445)42% (2,131/5,093)-5 pts14% (1,097/7,627)
Service treatment records silent for the conditionEvidence in the record23% (976/4,194)48% (3,556/7,344)-25 pts11% (514/4,772)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued29% (1,477/5,015)47% (3,055/6,523)-17 pts8% (430/5,492)
Board hearing held or testimony takenProcedure41% (2,428/5,971)38% (2,104/5,567)+3 pts21% (1,664/7,898)
Social Security records in the fileEvidence in the record25% (121/481)40% (4,411/11,057)-15 pts15% (84/575)
Vocational expert or assessmentEvidence in the record32% (15/47)39% (4,517/11,491)-7 pts15% (8/55)
Medical literature or treatise citedEvidence in the record41% (571/1,393)39% (3,961/10,145)+2 pts30% (598/2,000)
Functional loss / DeLuca factors argued (rating cases)Theory argued35% (575/1,621)40% (3,957/9,917)-4 pts15% (282/1,927)
Presumptive service connection discussedTheory argued28% (1,708/6,106)52% (2,824/5,432)-24 pts6% (396/6,544)
Secondary service connection (38 CFR 3.310) in playTheory argued41% (2,058/5,000)38% (2,474/6,538)+3 pts26% (1,823/6,997)
Combat service / 1154(b) in playTheory argued36% (400/1,124)40% (4,132/10,414)-4 pts14% (185/1,335)
A medical source gave a negative nexus opinionEvidence in the record40% (2,404/6,000)38% (2,128/5,538)+2 pts27% (2,226/8,265)
No nexus opinion of recordEvidence in the record11% (98/889)42% (4,434/10,649)-31 pts6% (62/968)
VA examination or VA medical opinion obtainedEvidence in the record39% (3,937/10,032)40% (595/1,506)-0 pts27% (3,790/13,994)
Board found a VA exam or opinion inadequateHow the Board read the record50% (1,407/2,837)36% (3,125/8,701)+14 pts46% (2,462/5,333)
Board found the VA exam or opinion adequateHow the Board read the record12% (109/886)42% (4,423/10,652)-29 pts2% (21/909)
Board found the veteran's statements credibleHow the Board read the record69% (820/1,192)36% (3,712/10,346)+33 pts7% (84/1,280)
Board found the veteran's statements not credible or inconsistentHow the Board read the record4% (25/572)41% (4,507/10,966)-37 pts1% (8/582)
PTSD stressor not corroboratedHow the Board read the record27% (10/37)39% (4,522/11,501)-12 pts0% (0/37)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record90% (1,925/2,146)28% (2,607/9,392)+62 pts1% (13/2,160)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record3% (142/4,588)63% (4,390/6,950)-60 pts0% (2/4,609)
Duty-to-assist error foundHow the Board read the record61% (86/140)39% (4,446/11,398)+22 pts85% (837/984)
Board ordered a new exam or addendum opinionProcedure43% (771/1,783)39% (3,761/9,755)+5 pts67% (3,696/5,539)
AMA favorable finding acknowledgedProcedure70% (387/549)38% (4,145/10,989)+33 pts36% (309/865)

"Granted" = share of issues decided on the merits (granted + denied); remands and dismissals are excluded from that fraction and shown separately. Fractions are the raw counts.

Increased rating for Knee (n = 8,404)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record33% (22/67)17% (889/5,347)+16 pts21% (18/87)
Private physician opinion, letter or DBQEvidence in the record20% (102/503)16% (809/4,911)+4 pts9% (52/561)
Disability Benefits Questionnaire in the recordEvidence in the record26% (41/158)17% (870/5,256)+9 pts59% (229/391)
Third-party lay statements (spouse, buddy, employer)Evidence in the record11% (12/108)17% (899/5,306)-6 pts8% (10/121)
Service treatment records document the condition or injuryEvidence in the record19% (246/1,271)16% (665/4,143)+3 pts4% (51/1,342)
Service treatment records silent for the conditionEvidence in the record21% (31/145)17% (880/5,269)+5 pts12% (20/173)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued29% (26/90)17% (885/5,324)+12 pts13% (15/119)
Board hearing held or testimony takenProcedure18% (399/2,271)16% (512/3,143)+1 pts27% (898/3,367)
Social Security records in the fileEvidence in the record13% (25/195)17% (886/5,219)-4 pts13% (30/230)
Vocational expert or assessmentEvidence in the record15% (14/94)17% (897/5,320)-2 pts9% (9/104)
Medical literature or treatise citedEvidence in the record22% (16/73)17% (895/5,341)+5 pts39% (50/127)
Functional loss / DeLuca factors argued (rating cases)Theory argued17% (839/5,018)18% (72/396)-1 pts27% (1,855/6,916)
Presumptive service connection discussedTheory argued25% (20/79)17% (891/5,335)+9 pts9% (9/98)
Secondary service connection (38 CFR 3.310) in playTheory argued18% (250/1,372)16% (661/4,042)+2 pts8% (127/1,539)
Combat service / 1154(b) in playTheory argued18% (18/99)17% (893/5,315)+1 pts13% (17/126)
A medical source gave a negative nexus opinionEvidence in the record21% (55/258)17% (856/5,156)+5 pts20% (66/333)
No nexus opinion of recordEvidence in the record23% (7/31)17% (904/5,383)+6 pts20% (8/41)
VA examination or VA medical opinion obtainedEvidence in the record17% (873/5,179)16% (38/235)+1 pts29% (2,142/7,415)
Board found a VA exam or opinion inadequateHow the Board read the record16% (102/636)17% (809/4,778)-1 pts61% (1,007/1,658)
Board found the VA exam or opinion adequateHow the Board read the record12% (75/600)17% (836/4,814)-5 pts3% (20/622)
Board found the veteran's statements credibleHow the Board read the record29% (56/195)16% (855/5,219)+12 pts6% (12/208)
Board found the veteran's statements not credible or inconsistentHow the Board read the record2% (1/44)17% (910/5,370)-15 pts14% (7/51)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record59% (172/291)14% (739/5,123)+45 pts3% (8/302)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record7% (221/3,257)32% (690/2,157)-25 pts0% (3/3,281)
Duty-to-assist error foundHow the Board read the record22% (7/32)17% (904/5,382)+5 pts83% (202/244)
Board ordered a new exam or addendum opinionProcedure11% (73/649)18% (838/4,765)-6 pts75% (2,019/2,696)

"Granted" = share of issues decided on the merits (granted + denied); remands and dismissals are excluded from that fraction and shown separately. Fractions are the raw counts.

All Knee issues, every benefit type (n = 30,329)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record60% (1,148/1,922)33% (6,188/18,821)+27 pts14% (309/2,243)
Private physician opinion, letter or DBQEvidence in the record47% (1,740/3,672)33% (5,596/17,071)+15 pts12% (486/4,190)
Disability Benefits Questionnaire in the recordEvidence in the record48% (317/661)35% (7,019/20,082)+13 pts43% (515/1,188)
Third-party lay statements (spouse, buddy, employer)Evidence in the record35% (385/1,088)35% (6,951/19,655)+0 pts14% (184/1,291)
Service treatment records document the condition or injuryEvidence in the record36% (3,043/8,441)35% (4,293/12,302)+1 pts12% (1,210/9,767)
Service treatment records silent for the conditionEvidence in the record23% (1,040/4,442)39% (6,296/16,301)-15 pts11% (547/5,070)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued29% (1,523/5,176)37% (5,813/15,567)-8 pts8% (452/5,697)
Board hearing held or testimony takenProcedure37% (3,668/9,917)34% (3,668/10,826)+3 pts22% (2,977/13,442)
Social Security records in the fileEvidence in the record25% (207/822)36% (7,129/19,921)-11 pts15% (151/993)
Vocational expert or assessmentEvidence in the record30% (80/271)35% (7,256/20,472)-6 pts12% (36/311)
Medical literature or treatise citedEvidence in the record40% (621/1,559)35% (6,715/19,184)+5 pts30% (677/2,250)
Functional loss / DeLuca factors argued (rating cases)Theory argued30% (2,601/8,796)40% (4,735/11,947)-10 pts23% (2,628/11,509)
Presumptive service connection discussedTheory argued28% (1,762/6,287)39% (5,574/14,456)-11 pts6% (419/6,767)
Secondary service connection (38 CFR 3.310) in playTheory argued38% (2,734/7,221)34% (4,602/13,522)+4 pts22% (2,075/9,538)
Combat service / 1154(b) in playTheory argued35% (457/1,292)35% (6,879/19,451)+0 pts14% (211/1,546)
A medical source gave a negative nexus opinionEvidence in the record39% (2,563/6,562)34% (4,773/14,181)+5 pts26% (2,368/8,985)
No nexus opinion of recordEvidence in the record11% (110/957)37% (7,226/19,786)-25 pts7% (72/1,049)
VA examination or VA medical opinion obtainedEvidence in the record35% (6,337/18,246)40% (999/2,497)-5 pts27% (6,709/25,261)
Board found a VA exam or opinion inadequateHow the Board read the record44% (1,730/3,907)33% (5,606/16,836)+11 pts49% (3,777/7,741)
Board found the VA exam or opinion adequateHow the Board read the record16% (281/1,724)37% (7,055/19,019)-21 pts3% (47/1,776)
Board found the veteran's statements credibleHow the Board read the record64% (982/1,540)33% (6,354/19,203)+31 pts6% (101/1,647)
Board found the veteran's statements not credible or inconsistentHow the Board read the record6% (39/664)36% (7,297/20,079)-30 pts2% (15/683)
PTSD stressor not corroboratedHow the Board read the record27% (11/41)35% (7,325/20,702)-9 pts0% (0/41)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record86% (2,488/2,879)27% (4,848/17,864)+59 pts1% (24/2,911)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record6% (557/9,081)58% (6,779/11,662)-52 pts0% (7/9,135)
Duty-to-assist error foundHow the Board read the record44% (111/251)35% (7,225/20,492)+9 pts80% (1,109/1,389)
Board ordered a new exam or addendum opinionProcedure36% (989/2,748)35% (6,347/17,995)+1 pts69% (6,455/9,309)
AMA favorable finding acknowledgedProcedure69% (424/612)34% (6,912/20,131)+35 pts36% (344/967)

"Granted" = share of issues decided on the merits (granted + denied); remands and dismissals are excluded from that fraction and shown separately. Fractions are the raw counts.

Reading these tables honestly

Association, not cause. A positive nexus opinion appears in the records of granted appeals far more often than in denied ones. That does not mean any letter wins; it means the Board grants when the evidence supports the claim, and a nexus opinion is how that support usually reaches the file.

Appeals are not claims. Every decision here is an appealed denial. Grant rates at the Board say nothing about the share of initial claims VA grants.

Findings are outcomes in disguise. Rows under "how the Board read the record" — credibility, benefit of the doubt, an inadequate exam — describe how the judge decided, not evidence to gather. They are shown because they say which arguments the Board actually reaches for.

Detection is by text pattern. Each evidence type is found by reading the decision for finding-shaped language with negation handling; precision was read on samples before publication and is stated per feature in the method notes below. Expect a few percent of misclassified rows, not zero.

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See also: Knee decisions · all conditions · outcome rates.