Sleep duration and sleep blood pressure: the Nagahama study

Reply to ‘Sleep duration and sleep blood pressure: the Nagahama Study’

“…Although Tabara et al . [3] did not find an association between sleeping at least 8 h per night and mean sleep BP, when the analysis was restricted to the small subset of participants who slept at least 9 h per night ( N = 69), there was a statistically significant association between long sleep duration and higher sleep DBP (2.1 mmHg, 95% CI 0.4–3.8), which is similar in magnitude to our findings in the CARDIA study. Although the association between at least 9 h per night and sleep SBP was not statistically significant in the Nagahama study (2.5 mmHg, 95% CI −0.2 to 5.1), the direction and magnitude of the association was similar to what we reported in the CARDIA study.…”

“…In the Nagahama study, Tabara et al . used a timer equipped cuff-oscillometric home BP monitor that recorded sleep BP at only three fixed time points during the night (0000, 0200 and 0400 h) [3]. In comparison, in the CARDIA study, we measured BP every 30 min throughout the night using ABPM.…”