Psychometric properties of a revised Danish translation of the international outcome inventory for hearing aids (IOI-HA)

Figures & data

Table 1. Wording of item 5 in the English original IOI-HA, along with the original and revised Danish translations supplied with English literal translations.

Original English IOI-HA	Over the past two weeks, with your present hearing aid(s), how much have your hearing difficulties affected the things you can do?” (1) affected very much, (2) affected quite a lot, (3) affected moderately, (4) affected slightly, (5) affected not at all
Original Danish IOI-HA translation	Hvor meget har dine høreproblemer med dit nuværende høreapparat i de seneste to uger haft indflydelse på de ting, du kan gøre? (1) betydelig indflydelse, (2) en hel del indflydelse, (3) moderat indflydelse, (4) lidt indflydelse, (5) slet ingen indflydelse
	How much have your hearing difficulties, with your current hearing aid, over the past two weeks had an influence on the things you can do? (1) significant influence, (2) a great deal of influence, (3) moderate influence, (4) slight influence, (5) no influence at all
Revised Danish IOI-HA translation	Hvor meget har dine resterende høreproblemer med dit nuværende høreapparat begrænset dig i dit daglige liv i de seneste to uger? (1) begrænset mig betydeligt, (2) begrænset mig en hel del, (3) begrænset mig moderat, (4) begrænset mig lidt, (5) slet ikke begrænset mig
	How much have your remaining hearing difficulties, with your current hearing aid, limited you in your daily life, over the past two weeks? (1) limited me significantly, (2) limited me a great deal, (3) limited me moderately, (4) limited me slightly, (5) not limited me at all

Figure 1. Mean score for each item on the revised Danish IOI-HA (n = 261).

Figure 2. Distribution of responses for each item for the revised Danish IOI-HA (n = 261).

Figure 3. Distribution of total outcome scores for the revised Danish IOI-HA (n = 261).

Table 2. Inter-item correlations for the revised Danish IOI-HA using Spearman's rho (n = 261).

Item no.	Item 2	Item 3	Item 4	Item 5	Item 6	Item 7
Item 1	0.44**	0.15	0.40**	0.10	0.13	0.36**
Item 2		0.39**	0.61**	0.33**	0.30**	0.72**
Item 3			0.35**	0.59**	0.60**	0.39**
Item 4				0.21**	0.19**	0.60**
Item 5					0.70**	0.34**
Item 6						0.30**

**Correlation is significant at the 0.01 level.

Figure 4. The location of each item in rotated space after varimax rotation on the revised Danish IOI-HA (n = 261).

Table 3. Loadings ≥ 0.5 of the revised Danish IOI-HA items on the two extracted factors after varimax rotation (n = 261).

Item no.	Factor 1	Factor 2
Item 1	0.50
Item 2	0.83
Item 3		0.66
Item 4	0.74
Item 5		0.82
Item 6		0.83
Item 7	0.77

Figure 5. Distribution of IOI-HA outcome scores for Factor 1 and Factor 2 fitted with a best-fit third-order polynomial (n = 261).

Table 4. Item-total statistics for the revised Danish IOI-HA (n = 261).

Item no.	Corrected item-total correlation	Cronbach's alpha if item deleted
Item 1	0.34**	0.83
Item 2	0.66**	0.77
Item 3	0.59**	0.79
Item 4	0.55**	0.79
Item 5	0.57**	0.80
Item 6	0.55**	0.80
Item 7	0.65**	0.78
Cronbach's alpha		0.82

**Correlation is significant at the 0.01 level.