We offer an explanation to the simulation result of Austin (2009) regarding rate ratios, and argue that unmatched analysis of propensity score matched count data results in conservative statistical inferences on the rate ratios.

Researchers often rely on self-report measures to assess sensitive health-risk behaviors in HIV+ individuals, yet the accuracy of self-report has been questioned, particularly when inquiring about behaviors that may be embarrassing, risky, and/or taboo. We compared an anonymous reporting method - the unmatched count technique (UCT) - to direct self-report (DSR) in order to assess reporting diff...

Misconduct in academic research is undoubtedly increasing, but studies estimating the prevalence of such behaviour suffer from biases inherent in researching sensitive topics. We compared the unmatched-count technique (UCT) and the crosswise-model (CM), two methods specifically designed to increase honest reporting to sensitive questions, with direct questioning (DQ) for five types of misconduc...

This study uses the unmatched count technique (UCT) to estimate base rates for hate crime victimization in college students and compares the results with estimates found using conventional methods. Hate crimes, criminal acts perpetrated against individuals or members of specific stigmatized groups, intend to express condemnation, hate, disapproval, dislike, or distrust for a group. The UCT is a...

Transformation of nested SQL queries into join queries is advantageous because a nested SQL query can be looked upon as a nested-loop join, which is just one of the several join implementations that may be available in a relational DBMS. In join queries, dangling (unmatched) operand tuples are lost, which causes a problem in transforming nested queries having the aggregate function COUNT betwee...

Research on pro-environmental behavior (PEB) informs social policies and interventions, so the quality of PEB measurement is critical. Self-reported measures in surveys often contain non-negligible error that can bias estimates lead to incorrect findings. Given potential presence error, we hypothesize changes way self-reported measured might systematic errors affect validity results. Study 1 (N...

In this paper, we extend the sliding mode idea to a class of unmatched uncertain variable structure systems. This method is achieved with introducing a new terminal sliding variable and the finite time stability of proposed method is proved using a new particular finite time condition in both reaching and sliding phases. In reaching phase new sliding mode controller is derived to guarantee the ...

background: full blood count has been shown to predict disease severity and mortality risk in cancer patients. this study aimed to highlight the degree of derangements of full blood count parameters and provide mean values in pre-chemotherapy breast cancer patients compared with apparently normal control subjects.methods: this was an unmatched case-control study among breast cancer patients att...