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 1,907,778 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 Headache (n = 4,959)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record73% (334/458)49% (1,345/2,746)+24 pts16% (85/545)
Private physician opinion, letter or DBQEvidence in the record65% (435/668)49% (1,244/2,536)+16 pts16% (129/803)
Disability Benefits Questionnaire in the recordEvidence in the record75% (181/240)51% (1,498/2,964)+25 pts35% (128/371)
Third-party lay statements (spouse, buddy, employer)Evidence in the record48% (135/282)53% (1,544/2,922)-5 pts17% (57/339)
Service treatment records document the condition or injuryEvidence in the record49% (865/1,767)57% (814/1,437)-8 pts15% (319/2,104)
Service treatment records silent for the conditionEvidence in the record32% (347/1,078)63% (1,332/2,126)-30 pts12% (153/1,243)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued47% (646/1,372)56% (1,033/1,832)-9 pts8% (120/1,502)
Board hearing held or testimony takenProcedure50% (748/1,494)54% (931/1,710)-4 pts21% (425/1,990)
Social Security records in the fileEvidence in the record35% (55/157)53% (1,624/3,047)-18 pts9% (16/175)
Medical literature or treatise citedEvidence in the record59% (307/522)51% (1,372/2,682)+8 pts37% (303/826)
Functional loss / DeLuca factors argued (rating cases)Theory argued45% (75/167)53% (1,604/3,037)-8 pts18% (37/207)
Presumptive service connection discussedTheory argued46% (659/1,429)57% (1,020/1,775)-11 pts13% (208/1,651)
Secondary service connection (38 CFR 3.310) in playTheory argued52% (791/1,522)53% (888/1,682)-1 pts33% (754/2,318)
Combat service / 1154(b) in playTheory argued52% (160/307)52% (1,519/2,897)-0 pts10% (34/347)
A medical source gave a negative nexus opinionEvidence in the record56% (950/1,706)49% (729/1,498)+7 pts31% (761/2,474)
No nexus opinion of recordEvidence in the record15% (30/196)55% (1,649/3,008)-40 pts14% (32/231)
VA examination or VA medical opinion obtainedEvidence in the record53% (1,463/2,769)50% (216/435)+3 pts31% (1,251/4,052)
Board found a VA exam or opinion inadequateHow the Board read the record64% (593/921)48% (1,086/2,283)+17 pts48% (849/1,777)
Board found the VA exam or opinion adequateHow the Board read the record21% (37/177)54% (1,642/3,027)-33 pts1% (2/180)
Board found the veteran's statements credibleHow the Board read the record86% (408/477)47% (1,271/2,727)+39 pts5% (23/501)
Board found the veteran's statements not credible or inconsistentHow the Board read the record11% (20/180)55% (1,659/3,024)-44 pts1% (2/182)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record94% (776/822)38% (903/2,382)+56 pts1% (9/832)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record4% (36/975)74% (1,643/2,229)-70 pts0% (4/982)
Duty-to-assist error foundHow the Board read the record63% (41/65)52% (1,638/3,139)+11 pts86% (456/529)
Board ordered a new exam or addendum opinionProcedure50% (256/510)53% (1,423/2,694)-3 pts70% (1,201/1,727)
AMA favorable finding acknowledgedProcedure85% (284/335)49% (1,395/2,869)+36 pts34% (172/510)

"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 = 2,811)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record39% (15/38)45% (848/1,891)-5 pts3% (1/39)
Private physician opinion, letter or DBQEvidence in the record48% (101/212)44% (762/1,717)+3 pts13% (31/245)
Disability Benefits Questionnaire in the recordEvidence in the record56% (108/193)43% (755/1,736)+12 pts29% (79/274)
Third-party lay statements (spouse, buddy, employer)Evidence in the record59% (89/152)44% (774/1,777)+15 pts8% (14/167)
Service treatment records document the condition or injuryEvidence in the record34% (86/255)46% (777/1,674)-13 pts3% (8/267)
Service treatment records silent for the conditionEvidence in the record34% (16/47)45% (847/1,882)-11 pts6% (3/53)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued56% (19/34)45% (844/1,895)+11 pts5% (2/38)
Board hearing held or testimony takenProcedure45% (288/643)45% (575/1,286)+0 pts17% (145/851)
Social Security records in the fileEvidence in the record34% (23/67)45% (840/1,862)-11 pts11% (9/79)
Vocational expert or assessmentEvidence in the record41% (18/44)45% (845/1,885)-4 pts2% (1/45)
Functional loss / DeLuca factors argued (rating cases)Theory argued42% (87/208)45% (776/1,721)-3 pts11% (26/235)
Secondary service connection (38 CFR 3.310) in playTheory argued38% (117/304)46% (746/1,625)-7 pts9% (32/346)
Combat service / 1154(b) in playTheory argued62% (30/48)44% (833/1,881)+18 pts12% (7/60)
A medical source gave a negative nexus opinionEvidence in the record36% (38/107)45% (825/1,822)-10 pts12% (15/125)
VA examination or VA medical opinion obtainedEvidence in the record45% (805/1,797)44% (58/132)+1 pts22% (512/2,331)
Board found a VA exam or opinion inadequateHow the Board read the record46% (88/191)45% (775/1,738)+1 pts47% (176/371)
Board found the VA exam or opinion adequateHow the Board read the record38% (61/162)45% (802/1,767)-8 pts2% (4/166)
Board found the veteran's statements credibleHow the Board read the record73% (169/232)41% (694/1,697)+32 pts2% (5/239)
Board found the veteran's statements not credible or inconsistentHow the Board read the record17% (5/30)45% (858/1,899)-29 pts3% (1/31)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record92% (322/349)34% (541/1,580)+58 pts1% (3/355)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record15% (113/743)63% (750/1,186)-48 pts0% (1/747)
Duty-to-assist error foundHow the Board read the record52% (16/31)45% (847/1,898)+7 pts83% (155/186)
Board ordered a new exam or addendum opinionProcedure37% (59/158)45% (804/1,771)-8 pts74% (474/641)

"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 = 10,012)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record70% (375/535)54% (3,480/6,443)+16 pts15% (92/629)
Private physician opinion, letter or DBQEvidence in the record63% (657/1,048)54% (3,198/5,930)+9 pts14% (168/1,225)
Disability Benefits Questionnaire in the recordEvidence in the record71% (430/607)54% (3,425/6,371)+17 pts27% (225/838)
Third-party lay statements (spouse, buddy, employer)Evidence in the record59% (324/552)55% (3,531/6,426)+4 pts12% (77/630)
Service treatment records document the condition or injuryEvidence in the record49% (1,090/2,230)58% (2,765/4,748)-9 pts13% (330/2,587)
Service treatment records silent for the conditionEvidence in the record33% (378/1,162)60% (3,477/5,816)-27 pts12% (156/1,337)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued47% (679/1,434)57% (3,176/5,544)-10 pts8% (124/1,571)
Board hearing held or testimony takenProcedure54% (1,474/2,732)56% (2,381/4,246)-2 pts18% (624/3,520)
Social Security records in the fileEvidence in the record39% (104/268)56% (3,751/6,710)-17 pts12% (38/312)
Vocational expert or assessmentEvidence in the record60% (58/96)55% (3,797/6,882)+5 pts8% (8/105)
Medical literature or treatise citedEvidence in the record59% (343/579)55% (3,512/6,399)+4 pts37% (340/921)
Functional loss / DeLuca factors argued (rating cases)Theory argued54% (286/531)55% (3,569/6,447)-1 pts12% (71/609)
Presumptive service connection discussedTheory argued46% (690/1,494)58% (3,165/5,484)-12 pts12% (214/1,725)
Secondary service connection (38 CFR 3.310) in playTheory argued52% (1,078/2,088)57% (2,777/4,890)-5 pts27% (799/2,949)
Combat service / 1154(b) in playTheory argued56% (234/417)55% (3,621/6,561)+1 pts9% (42/472)
Military sexual trauma / personal assault claimTheory argued55% (17/31)55% (3,838/6,947)-0 pts16% (6/38)
A medical source gave a negative nexus opinionEvidence in the record55% (1,035/1,896)55% (2,820/5,082)-1 pts29% (795/2,705)
No nexus opinion of recordEvidence in the record16% (33/206)56% (3,822/6,772)-40 pts14% (33/244)
VA examination or VA medical opinion obtainedEvidence in the record56% (3,397/6,088)51% (458/890)+4 pts24% (1,911/8,070)
Board found a VA exam or opinion inadequateHow the Board read the record63% (810/1,280)53% (3,045/5,698)+10 pts45% (1,071/2,363)
Board found the VA exam or opinion adequateHow the Board read the record38% (168/437)56% (3,687/6,541)-18 pts2% (7/445)
Board found the veteran's statements credibleHow the Board read the record83% (744/895)51% (3,111/6,083)+32 pts3% (29/927)
Board found the veteran's statements not credible or inconsistentHow the Board read the record14% (33/242)57% (3,822/6,736)-43 pts2% (4/246)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record94% (1,493/1,581)44% (2,362/5,397)+51 pts1% (13/1,598)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record12% (255/2,059)73% (3,600/4,919)-61 pts0% (5/2,074)
Duty-to-assist error foundHow the Board read the record57% (92/161)55% (3,763/6,817)+2 pts79% (659/832)
Board ordered a new exam or addendum opinionProcedure49% (389/786)56% (3,466/6,192)-6 pts69% (1,795/2,608)
AMA favorable finding acknowledgedProcedure83% (320/386)54% (3,535/6,592)+29 pts32% (180/570)

"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.