Hearing loss

Tier: Burden tier · Matched burden cause: Age-related and other hearing loss (GBD cause 674), GBD 2023 (DALYs primary).

Publication share of the 14-area pool

Pool share (%) by five-year period. Pool totals: 1995–1999 26,544, 2000–2004 36,611, 2005–2009 50,051, 2010–2014 65,755, 2015–2019 85,380, 2020–2024 128,117.

Period	1995–1999	2000–2004	2005–2009	2010–2014	2015–2019	2020–2024
Publications	5,411	7,132	9,074	11,947	15,407	21,659
Share of pool (%)	20.39%	19.48%	18.13%	18.17%	18.05%	16.91%

First-to-last share change: -17.1% (relative). Dynamics label: Constant.

Attention–burden ratio (ABR)

log2 ABR by period (dashed line = parity, ABR 1). Last period pairs publications 2020–24 with burden 2020–23 (see Methods).

Period	1995–1999	2000–2004	2005–2009	2010–2014	2015–2019	2020–2024
log2 ABR	-1.05	-1.10	-1.14	-1.25	-1.32	-1.47
ABR	0.48	0.47	0.45	0.42	0.40	0.36
Publication share of 7-cause pool (%)	33.5%	33.0%	32.5%	30.5%	29.3%	26.3%
DALY share of 7-cause pool (%)	69.2%	70.6%	71.7%	72.5%	73.0%	72.7%

Hearing loss is typed constant on dynamics only. Its level is the census's central level finding: ABR 0.36 in 2020–24 (log2 ABR −1.47), i.e. 72.7% of pooled DALYs against 26.3% of pooled publications, with the gap widening over 30 years.

Burden–research centroid distance

Great-circle distance (km) between the DALY-weighted burden centroid and the first-author research centroid (arithmetic mean centres; see Methods).

Period	1995–1999	2000–2004	2005–2009	2010–2014	2015–2019	2020–2024
Distance (km)	9,751	8,778	8,133	7,507	6,554	3,799

First-to-last change: -61.0% (9,751 → 3,799 km). Last-period distances remain large in absolute terms for every cause.

First-author geography

LMIC share of parsed first-author records: 6.8% → 33.8% (this area; pooled across all 14 areas: 7.9% → 39.8%). Share of first authors located in this cause's ten highest-DALY countries: 48.3% → 51.4%.

Decoupling typology

Signal	Value	Direction (main thresholds)
S — relative change in pool publication share	-17.1%	stable
B — relative change in DALY share of the 7-cause pool	+5.0%	stable
A — change in log2 ABR	-0.42	stable

Threshold set	Assigned type
Low (±15% / ±0.3)	Unclassified
Main (±25% / ±0.5)	Constant
High (±35% / ±0.7)	Constant

Annualised absolute DALYs for this cause changed +76.8% between the first and last periods. B is a share: a falling B means relative dilution inside the pool, never an absolute decline.

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