Fibromyalgia: what evidence wins at the Board

For fibromyalgia 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 Fibromyalgia (n = 591)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record66% (42/64)47% (144/307)+19 pts9% (6/70)
Private physician opinion, letter or DBQEvidence in the record52% (46/88)49% (140/283)+3 pts17% (18/106)
Service treatment records document the condition or injuryEvidence in the record42% (63/150)56% (123/221)-14 pts19% (36/187)
Service treatment records silent for the conditionEvidence in the record27% (36/131)62% (150/240)-35 pts10% (15/146)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued38% (44/117)56% (142/254)-18 pts9% (11/128)
Board hearing held or testimony takenProcedure54% (107/199)46% (79/172)+8 pts23% (62/271)
Medical literature or treatise citedEvidence in the record44% (29/66)51% (157/305)-8 pts33% (33/99)
Presumptive service connection discussedTheory argued49% (93/190)51% (93/181)-2 pts10% (21/211)
Secondary service connection (38 CFR 3.310) in playTheory argued49% (67/138)51% (119/233)-3 pts28% (54/193)
A medical source gave a negative nexus opinionEvidence in the record46% (77/167)53% (109/204)-7 pts23% (50/218)
VA examination or VA medical opinion obtainedEvidence in the record50% (165/331)52% (21/40)-3 pts33% (162/495)
Board found a VA exam or opinion inadequateHow the Board read the record47% (44/94)51% (142/277)-4 pts49% (93/188)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record88% (87/99)36% (99/272)+51 pts0% (0/99)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record4% (5/137)77% (181/234)-74 pts0% (0/137)
Board ordered a new exam or addendum opinionProcedure44% (21/48)51% (165/323)-7 pts77% (168/217)

"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 Fibromyalgia issues, every benefit type (n = 809)

When the record had…Granted, with itGranted, without itDifferenceRemanded, with it
A medical source gave a positive nexus opinionEvidence in the record68% (46/68)48% (221/465)+20 pts8% (6/74)
Private physician opinion, letter or DBQEvidence in the record51% (55/107)50% (212/426)+2 pts16% (21/128)
Disability Benefits Questionnaire in the recordEvidence in the record60% (18/30)50% (249/503)+10 pts41% (21/51)
Service treatment records document the condition or injuryEvidence in the record43% (72/166)53% (195/367)-10 pts19% (38/205)
Service treatment records silent for the conditionEvidence in the record29% (39/136)57% (228/397)-29 pts11% (16/152)
Continuity of symptoms argued (38 CFR 3.303(b))Theory argued38% (46/121)54% (221/412)-16 pts8% (11/132)
Board hearing held or testimony takenProcedure54% (140/258)46% (127/275)+8 pts22% (75/348)
Social Security records in the fileEvidence in the record31% (10/32)51% (257/501)-20 pts9% (3/35)
Medical literature or treatise citedEvidence in the record46% (31/68)51% (236/465)-5 pts34% (36/105)
Functional loss / DeLuca factors argued (rating cases)Theory argued49% (34/69)50% (233/464)-1 pts7% (5/75)
Presumptive service connection discussedTheory argued50% (99/199)50% (168/334)-1 pts10% (21/220)
Secondary service connection (38 CFR 3.310) in playTheory argued49% (82/168)51% (185/365)-2 pts26% (59/229)
A medical source gave a negative nexus opinionEvidence in the record47% (82/176)52% (185/357)-5 pts23% (52/230)
VA examination or VA medical opinion obtainedEvidence in the record51% (234/457)43% (33/76)+8 pts28% (181/644)
Board found a VA exam or opinion inadequateHow the Board read the record48% (51/106)51% (216/427)-2 pts49% (101/208)
Board found the VA exam or opinion adequateHow the Board read the record23% (8/35)52% (259/498)-29 pts0% (0/35)
Benefit of the doubt resolved in the veteran's favorHow the Board read the record90% (113/125)38% (154/408)+53 pts0% (0/125)
Preponderance of the evidence against / doctrine not applicableHow the Board read the record7% (13/180)72% (254/353)-65 pts0% (0/180)
Board ordered a new exam or addendum opinionProcedure45% (28/62)51% (239/471)-6 pts74% (186/250)

"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.

Which of these is missing from your file?

VetAid's free analyzer reads your decision letter and records, then ranks the evidence gaps by exactly these numbers — for your conditions, not the average.

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