Chapter 4 114 The right panel of Figure 4.1 shows the distribution of reported sleep disruptions, as measured using PSQI item 5B, per group. NC women most commonly reported sleep disruptions less than once a week (40.2%), OC users most commonly reported sleep disruptions once or twice a week (32.2%) and men most commonly reported experiencing no sleep disruptions in the past month (31.5%) or less than once a week (31.5%). Statistical analyses show that the probability that an NC woman had more disrupted sleep compared to an OC user was not significantly different than 0.5, indicating no significant differences, in the marginal model (π=0.51, 95% CI [0.40-0.63], p=0.84), nor in the age-corrected model (π=0.52, 95% CI [0.40-0.64], p=0.73, padjusted=0.73). Similarly, the analyses indicated no significant differences between the rates of disrupted sleep in NC women compared to men in the marginal model (0.47, 95% CI [0.39-0.54], p=0.40), nor in the age-corrected model (π=0.45, 95% CI [0.38-0.53], p=0.73, padjusted=0.21). Results of the marginal and age-corrected models are also reported in Table 4.2. Figure 4.1. Sleep disruptions, as measured using item 5B from the PSQI, and sleep quality, as measured using the PSQI sum score, per group. The left panel shows proportions of reported sleep disruptions (i.e. answers to PSQI 5B) per group, the right panel shows individual overall sleep quality (i.e. PSQI sum scores; displayed by dots) and median and first and third quantiles per group (displayed in boxplots). *: padjusted<0.05.
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