Hearing aid fitting in older persons with hearing impairment: the influence of cognitive function, age, and hearing loss on hearing aid benefit

Figures & data

Table 1 Benefit measures for speech in a quiet environment (improvement in %), speech in steady-state noise (improvement in dB SNR), and speech in fluctuating noise (improvement in dB SNR)

Benefit measure		Mean	Standard deviation	Percentiles
				10	25	50	75	90
Speech in quiet conditions (%)		26.3	21.6	0.5	10	20	37.5	55
Speech in steady-state noise (dB SNR)	L50	0.74	1.36	−0.58	−0.2	0.5	1.0	2.44
	L80	0.79	2.02	−1.20	−0.40	0.35	1.90	2.83
Speech in fluctuating noise (dB SNR)	L50	2.60	2.22	−0.20	1.53	2.65	3.83	4.55
	L80	2.81	2.34	0.14	0.78	2.65	4.20	4.97

Notes: Means, standard deviations, and percentiles are given. L50, 50% speech recognition; L80, 80% speech recognition.

Abbreviation: SNR, signal-to-noise ratio.

Table 2 Outcome of the IOI-HA with respect to the items: HA use (item 1), benefit (item 2), residual activity limitations (item 3), satisfaction (item 4), residual participation restrictions (item 5), impact on others (item 6), and change of quality of life (item 7) as well as an overall measure

IOI-HA item no	Mean	Standard deviation	Percentiles
			10	25	50	75	90
1	4.3	1.0	3	4	5	5	5
2	3.7	0.9	3	3	4	4	5
3	3.3	0.7	2	3	3	4	4
4	4.1	0.9	2	4	4	5	5
5	4.0	1.0	3	4	5	5	5
6	4.4	0.8	3	4	5	5	5
7	3.8	0.8	3	3	4	4	5
Overall	3.9	0.6	2.9	3.7	4.1	4.4	4.6

Notes: Means, standard deviations, and percentiles are given.

Abbreviation: IOI-HA, International Hearing Aid Outcome Inventory.

Table 3 Outcome of the different neuropsychological tests

Cognitive Test	Mean	Standard deviation	Percentiles
			10	25	50	75	90
MWT-B	30.9	3.5	26	28	30	34	35
LPS-4	22.6	4.3	16	20.5	23	25.5	27
VLMT	46.9	11.1	31	39.5	47	55.5	63
SS (%)	42	29	8.8	16.1	39	70	78.6
d2	113.8	28.8	87	92	113	127.5	168
ZVT (s)	106.1	23.0	81.5	90.8	101	117.2	143

Notes: Mean, standard deviation, and percentiles are given.

Abbreviations: d2, Aufmerksamkeits-Belastungs-Test; LPS-4, Leistungsprüfungs-system subtest 4; MWT-B, Mehrfachwahl-Wortschatz-Intelligenztest, part B; SS, sentence span; VLMT, Verbaler Lern- und Merkfähigkeitstest; ZVT, Zahlen-Verbindungs-Test.

Figure 1 Explained variance of objective HA benefit based on the significantly contributing independent variables.

Note: Asterisks depict level of significance (**P<0.01; *P<0.05).
Abbreviations: BEHL, better ear hearing loss; HA, hearing aid; LPS-4, Leistungsprüfungssystem subtest 4; SS, sentence span.