The current study did not capture variables associated with mental health status, including depression and anxiety, which may influence use of emergency rooms (Sandoval et al. 2010).
Patient mobility is another factor that may influence use of SM in urban women.
CAM use varies between different parts of the country [ 23, 19], and this may influence use among consulters also.
These factors include regulatory policies that may influence use of antimicrobial drugs, infection control practices, technologic development, and drug discovery.
The error term, ε, represents unmeasured factors that may influence use of postnatal care at a health facility.
It is possible however, that the strategies that make up the delivery system may influence use, for example, whether the ITN was given free of charge or was purchased.
Results from the postal questionnaire, interviews and focus groups will be used to develop hypotheses about factors that may influence use of self-tests other than pregnancy tests: pregnancy tests will be excluded as women have used them for some time and their use is probably now expected by doctors.
In support of the theory that strategy may influence use of drugs of abuse, previous studies showed that response navigational strategies emerge as early as age 7 years old (Bohbot et al., 2012; Lin et al., 2012), well before the onset of using abused substances.
Likewise, the data suggest that the enforcement of the law (as measured by the likelihood of being fined for infractions) may influence use, thereby explaining the regional differences and the highest use rate in the south where fines were also most common.
Besides race, we considered other sociodemographic and clinical characteristics which may potentially influence using treatment approaches.
