Headache: what evidence wins at the Board

For headache 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 1,929,585 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 (1992–2025) — 971,127 decisions — so each evidence flag attaches to exactly one decided issue. A split is shown only when both sides have at least 30 decisions. Every count opens its decisions in the Board decision finder, with links to the full text on va.gov. Data build: 2026-10-16.

Service connection for Headache (n = 6,085)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record73% (338/465)48% (1,388/2,921)+25 pts19% (109/576)
Private physician opinion, letter or DBQEvidence in the record64% (441/689)48% (1,285/2,697)+16 pts22% (196/891)
Disability Benefits Questionnaire in the recordEvidence in the record75% (181/241)49% (1,545/3,145)+26 pts35% (134/378)
Third-party lay statements (spouse, buddy, employer)Evidence in the record47% (139/294)51% (1,587/3,092)-4 pts21% (78/372)
Service treatment records document the condition or injuryEvidence in the record48% (891/1,865)55% (835/1,521)-7 pts23% (570/2,453)
Service treatment records silent for the conditionEvidence in the record31% (356/1,146)61% (1,370/2,240)-30 pts17% (240/1,398)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued46% (657/1,422)54% (1,069/1,964)-8 pts12% (193/1,625)
Board hearing held or testimony takenProcedure49% (776/1,588)53% (950/1,798)-4 pts35% (886/2,545)
Social Security records in the fileEvidence in the record34% (55/160)52% (1,671/3,226)-17 pts30% (69/231)
Medical literature or treatise citedEvidence in the record58% (307/530)50% (1,419/2,856)+8 pts40% (348/879)
Functional loss / DeLuca factors argued (rating cases)Theory argued45% (77/172)51% (1,649/3,214)-7 pts28% (67/242)
Presumptive service connection discussedTheory argued45% (667/1,481)56% (1,059/1,905)-11 pts15% (270/1,765)
Secondary service connection (38 CFR 3.310) in playTheory argued51% (806/1,594)51% (920/1,792)-1 pts38% (1,014/2,650)
Combat service / 1154(b) in playTheory argued51% (165/324)51% (1,561/3,062)-0 pts16% (65/395)
A medical source gave a negative nexus opinionEvidence in the record55% (954/1,738)47% (772/1,648)+8 pts35% (948/2,693)
No nexus opinion of recordEvidence in the record14% (30/207)53% (1,696/3,179)-39 pts17% (44/254)
VA examination or VA medical opinion obtainedEvidence in the record52% (1,499/2,877)45% (227/509)+8 pts40% (1,901/4,810)
Board found a VA exam or opinion inadequateHow the Board read the record64% (597/936)46% (1,129/2,450)+18 pts53% (1,063/2,006)
Board found the VA exam or opinion adequateHow the Board read the record21% (37/179)53% (1,689/3,207)-32 pts3% (6/186)
Board found the veteran's statements credibleHow the Board read the record85% (414/485)45% (1,312/2,901)+40 pts7% (37/523)
Board found the veteran's statements not credible or inconsistentHow the Board read the record11% (21/188)53% (1,705/3,198)-42 pts1% (2/190)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record94% (789/837)37% (937/2,549)+58 pts1% (10/848)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record4% (40/1,041)72% (1,686/2,345)-68 pts0% (4/1,048)
Duty-to-assist error foundHow the Board read the record63% (41/65)51% (1,685/3,321)+12 pts86% (457/530)
Board ordered a new exam or addendum opinionProcedure50% (263/524)51% (1,463/2,862)-1 pts77% (1,808/2,348)
AMA favorable finding acknowledgedProcedure84% (284/337)47% (1,442/3,049)+37 pts33% (171/511)

"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 Headache (n = 3,519)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record38% (15/39)44% (876/1,972)-6 pts9% (4/43)
Private physician opinion, letter or DBQEvidence in the record47% (104/219)44% (787/1,792)+4 pts18% (50/271)
Disability Benefits Questionnaire in the recordEvidence in the record56% (109/194)43% (782/1,817)+13 pts33% (98/294)
Third-party lay statements (spouse, buddy, employer)Evidence in the record59% (91/155)43% (800/1,856)+16 pts16% (30/186)
Service treatment records document the condition or injuryEvidence in the record33% (95/289)46% (796/1,722)-13 pts8% (24/318)
Service treatment records silent for the conditionEvidence in the record35% (18/52)45% (873/1,959)-10 pts5% (3/58)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued54% (19/35)44% (872/1,976)+10 pts8% (3/40)
Board hearing held or testimony takenProcedure44% (300/682)44% (591/1,329)-0 pts36% (413/1,158)
Social Security records in the fileEvidence in the record34% (23/68)45% (868/1,943)-11 pts37% (41/112)
Vocational expert or assessmentEvidence in the record38% (19/50)44% (872/1,961)-6 pts25% (17/67)
Medical literature or treatise citedEvidence in the record52% (16/31)44% (875/1,980)+7 pts52% (35/67)
Functional loss / DeLuca factors argued (rating cases)Theory argued43% (92/216)45% (799/1,795)-2 pts15% (39/256)
Secondary service connection (38 CFR 3.310) in playTheory argued37% (122/328)46% (769/1,683)-8 pts23% (102/441)
Combat service / 1154(b) in playTheory argued62% (32/52)44% (859/1,959)+18 pts16% (11/68)
A medical source gave a negative nexus opinionEvidence in the record35% (38/110)45% (853/1,901)-10 pts16% (22/136)
VA examination or VA medical opinion obtainedEvidence in the record44% (828/1,865)43% (63/146)+1 pts34% (972/2,860)
Board found a VA exam or opinion inadequateHow the Board read the record45% (88/195)44% (803/1,816)+1 pts56% (255/454)
Board found the VA exam or opinion adequateHow the Board read the record38% (63/166)45% (828/1,845)-7 pts3% (6/173)
Board found the veteran's statements credibleHow the Board read the record73% (169/232)41% (722/1,779)+32 pts2% (5/239)
Board found the veteran's statements not credible or inconsistentHow the Board read the record17% (5/30)45% (886/1,981)-28 pts6% (2/32)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record92% (328/355)34% (563/1,656)+58 pts1% (3/361)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record15% (117/784)63% (774/1,227)-48 pts0% (1/789)
Duty-to-assist error foundHow the Board read the record52% (16/31)44% (875/1,980)+7 pts83% (156/187)
Board ordered a new exam or addendum opinionProcedure38% (63/167)45% (828/1,844)-7 pts83% (875/1,051)

"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 Headache issues, every benefit type (n = 12,176)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record70% (379/544)53% (3,637/6,800)+16 pts18% (119/665)
Private physician opinion, letter or DBQEvidence in the record62% (673/1,085)53% (3,343/6,259)+9 pts19% (264/1,358)
Disability Benefits Questionnaire in the recordEvidence in the record71% (436/614)53% (3,580/6,730)+18 pts29% (251/871)
Third-party lay statements (spouse, buddy, employer)Evidence in the record59% (338/575)54% (3,678/6,769)+4 pts17% (119/695)
Service treatment records document the condition or injuryEvidence in the record48% (1,141/2,386)58% (2,875/4,958)-10 pts20% (612/3,026)
Service treatment records silent for the conditionEvidence in the record32% (390/1,238)59% (3,626/6,106)-28 pts16% (243/1,500)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued46% (691/1,488)57% (3,325/5,856)-10 pts12% (198/1,699)
Board hearing held or testimony takenProcedure53% (1,552/2,910)56% (2,464/4,434)-2 pts32% (1,448/4,522)
Social Security records in the fileEvidence in the record38% (105/273)55% (3,911/7,071)-17 pts31% (128/407)
Vocational expert or assessmentEvidence in the record59% (64/108)55% (3,952/7,236)+5 pts23% (32/141)
Medical literature or treatise citedEvidence in the record58% (344/590)54% (3,672/6,754)+4 pts40% (397/989)
Functional loss / DeLuca factors argued (rating cases)Theory argued54% (300/551)55% (3,716/6,793)-0 pts17% (118/676)
Presumptive service connection discussedTheory argued45% (699/1,549)57% (3,317/5,795)-12 pts15% (276/1,842)
Secondary service connection (38 CFR 3.310) in playTheory argued50% (1,107/2,198)57% (2,909/5,146)-6 pts34% (1,161/3,422)
Combat service / 1154(b) in playTheory argued55% (246/444)55% (3,770/6,900)+1 pts15% (79/536)
Military sexual trauma / personal assault claimTheory argued56% (18/32)55% (3,998/7,312)+2 pts15% (6/39)
A medical source gave a negative nexus opinionEvidence in the record54% (1,042/1,934)55% (2,974/5,410)-1 pts34% (994/2,943)
No nexus opinion of recordEvidence in the record16% (35/220)56% (3,981/7,124)-40 pts17% (46/271)
VA examination or VA medical opinion obtainedEvidence in the record56% (3,531/6,349)49% (485/995)+7 pts33% (3,148/9,569)
Board found a VA exam or opinion inadequateHow the Board read the record63% (837/1,326)53% (3,179/6,018)+10 pts51% (1,385/2,723)
Board found the VA exam or opinion adequateHow the Board read the record38% (171/445)56% (3,845/6,899)-17 pts3% (14/461)
Board found the veteran's statements credibleHow the Board read the record83% (755/908)51% (3,261/6,436)+32 pts5% (44/955)
Board found the veteran's statements not credible or inconsistentHow the Board read the record14% (34/250)56% (3,982/7,094)-43 pts2% (5/255)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record94% (1,525/1,615)43% (2,491/5,729)+51 pts1% (14/1,633)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record12% (264/2,176)73% (3,752/5,168)-60 pts0% (5/2,192)
Duty-to-assist error foundHow the Board read the record57% (93/163)55% (3,923/7,181)+2 pts79% (663/838)
Board ordered a new exam or addendum opinionProcedure50% (407/818)55% (3,609/6,526)-6 pts78% (2,922/3,767)
AMA favorable finding acknowledgedProcedure82% (320/388)53% (3,696/6,956)+29 pts31% (180/572)

"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: Headache decisions · all conditions · outcome rates.

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