Table 3.

Participants’ perception of the online and the paper version of the 7-day dietary record

	Paper (%)	Online (%)	p value
Appreciation of the general layout of the questionnaire
Cleara	76.1	95.9	≤0.0001*
Friendlya	83.1	94.3	0.0018*
Perception of the data collection tool
Convenienta	62.3	89.4	≤0.0001*
Quicka	51.6	85.2	≤0.0001*
Easya	70.8	91.0	≤0.0001*
Number of days needed to master to the completion of the method
From day 1b	20.0	34.4	0.0009*
From day 2b	37.7	48.4
From day 3b	31.5	13.1
Beyond day 4b	6.9	3.3
Neverb	3.8	0.8

p values less than 0.05 are in italics

^aExpressed as the percentage of participants who qualified the method “very” or “rather”

^bExpressed as the percentage of participants who declared mastering the completion of the 7-day dietary record

* McNemar’s Chi-square test for paired sample