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Number of subjects reporting doubts about the proclaimed aim of the study.
| Investigation 1a | Investigation 2a | Investigation 3b | ||
|---|---|---|---|---|
| Doubts about study aim? | No | 18 | 16 | 10 |
| Yes | 3 | 4 | 3 | |
aProclaimed aim of the study was to compare the pain intensity during venipuncture with two different sizes of a new kind of indwelling venous catheters. bProclaimed aim of the study was to examine whether injection of naloxone would influence perceived pain during VP.
