The phrase "a questionnaire only" is correct and usable in written English.
It can be used to specify that the focus is solely on the questionnaire aspect, excluding other elements or components.
Example: "For this study, we will be collecting data through a questionnaire only, without any additional interviews or observations."
Alternatives: "only a questionnaire" or "just a questionnaire".
This survey consisted of a questionnaire only.
These volunteers, who met the same inclusion and exclusion criteria as those recruited during phase 1, were asked to donate blood and answer a questionnaire only once.
For persons reporting ARI, differences were significant between those who completed a questionnaire only and those who also gave a blood sample for students (37.3% vs. 48.3%; χ p = 0.020) and staff (10.2% vs. 30.8%; χ p <0.001).
Finally, whilst sending either a postcard or a second questionnaire as a reminder to non-responders (Qpx, QQx) increases response relative to a questionnaire only, it does so inefficiently.
A summary diagram of the quality assessment is shown in Figure 2. A variety of reference standards were used: colonoscopy, rigid sigmoidoscopy with (double contrast) barium enaema, air-contrast barium enaema, flexible sigmoidoscopy, flexible sigmoidoscopy and questionnaire, a questionnaire only, barium enaema only, and proctoscopy with sonography.
The proportions of students in age groups 13 15 years and 16 18 years were similar for those completing a questionnaire only (46.7% vs. 53.3%) compared to those in the matched study sample (41.7% vs. 58.3%; χ p = 0.25) (Table A1), and similar to the school's student population.
Table 1 shows that participants who completed baseline and preadmission questionnaires (n = 134) were similar to those who completed a baseline questionnaire only (n = 194) across a range of demographic and baseline characteristics.
Out of the first 168 patients completing a screening questionnaire, only eight were randomised.
However, GPs and nurses were not able to see each other's responses as this was an online questionnaire, only accessible by the researchers.
Three of the prevention trials measured LBP incidence via reported LBP and at least a day off duty [ 37, 38, 40], two trials used a self-report questionnaire plus a medical assessment [ 36, 39], while the final trial used a self-report questionnaire only [ 41].
Participants were randomised to a control group (questionnaire only, no screening) or one of two intervention groups: screening only and screening plus health discussions (time points not given).
