Key information providers, channels, and characteristics of Japanese consumers’ informed choices of over-the-counter medications

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Table 4 Associations between the use of information channels and the purchase of OTCs

Information channel (used: yes/no)	Multivariate logistic regression analysis^a
Information channel (used: yes/no)	OR^b (95 % CI)	P-value^c
Consultation at pharmacies
Yes	4.55 (2.92, 7.11)	<0.001
No	1.00 [Reference]
Family or friends
Yes	0.55 (0.36, 0.82)	0.004
No	1.00 [Reference]
Internet
Yes	1.29 (0.86, 1.93)	0.213
No	1.00 [Reference]
Consultation at medical institutions
Yes	0.94 (0.63, 1.39)	0.750
No	1.00 [Reference]
TV or radio
Yes	1.05 (0.70, 1.59)	0.809
No	1.00 [Reference]
Newspapers or advertising inserts
Yes	0.74 (0.47, 1.16)	0.189
No	1.00 [Reference]
Packages or package leaflets
Yes	1.02 (0.63, 1.64)	0.943
No	1.00 [Reference]
Books or magazines
Yes	1.48 (0.72, 3.04)	0.293
No	1.00 [Reference]
Customer services of OTC manufacturers
Yes	0.93 (0.48, 1.80)	0.838
No	1.00 [Reference]
Consultation services of public organizations
Yes	1.14 (0.53, 2.46)	0.734
No	1.00 [Reference]

The outcome and predictor variables were the purchase of OTCs (Yes/No) and the use of each information channel (Yes/No), respectively
CI confidence interval, OR odds ratio, OTC over-the-counter medication
^an = 1743
^bVariables were mutually adjusted
^cStatistically significant (P < 0.05)