Conducting a series of consecutive cross-sectional surveys to investigate the psycho-behavioral associations is a better option than using a single cross-sectional survey.
Because the data for both independent variables and dependent variables was collected using a single instrument (a survey), we conducted a common method bias test to determine if a method bias was affecting the results of our measurement model.
Some studies have found reduced risk for incidence and mortality of cancer and CVD associated with a long duration of vitamin supplement use [ 13, 14, 27, 28, 31- 34]; however, consistent use of vitamin supplements could not be clearly determined by using a single time-point survey at baseline.
However, when using a single-gene survey in the database of microbial sequenced genomes, we detected orphan false-positive hits in several non-diazotrophic genomes.
It is also important to note a significant limitation of the study, namely that the data used cover a single survey period only (1980s 1990s), so particular quantitative results are dependent on conditions in this period and must be treated with caution.
Data from assays used in a single survey with small sample sizes will have only a modest effect on informing estimates and results may be biased if the calibrating parameters are not accurate.
We present the first pilot study of a microseismic monitoring survey using a single vertical downhole array in an onshore oilfield in Abu Dhabi, the United Arab Emirates.
We developed harmonised versions of the ABC to measure the constructs in each country and harmonised the survey methods, using a single provider to carry out the sampling and interviews.
We did not include burnout in the first model since it was assessed using a single item from the healthcare worker survey, whose validation with a more accepted Maslach Burnout Inventory has been conducted outside of resource-limited setting [ 23].
The sample size was determined by Epi Info 2002 software package using a single proportion formula for cross-sectional survey, based on the prevalence of alcohol consumption (44%) during the past year among university students [ 23].
