Objective and Subjective Effects of a Prototype Nasal Dilator Strip on Sleep in Subjects with Chronic Nocturnal Nasal Congestion.

However, while the global sleep assessments performed in the current study were all highly significant ( P ≤ 0.002), there is an apparent lack of correlation between these subjective findings and many of the objective (PSG) measures of sleep, as no significant improvements were detected via PSG, including for arousals per hour, sleep efficiency, and sleep onset latency.

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There was a numerical trend suggesting a possible shift in breathing route from oronasal to nasal during both phases of the study (Table 3 ); however, statistical analysis of the data from the active phase by both Wilcoxon test ( P = 0.359) and two-sample t test ( P = 0.559) showed that this trend did not reach statistical significance.

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