A cross‐sectional study of the interaction between night shift frequency and age on hypertension prevalence among female nurses

Abstract

Night shift is a common work schedule. This study aimed to analyze the interaction between age and frequency of night shift on the hypertension prevalence. A census questionnaire was conducted in 512 medical institutions in 11 cities of Hebei Province. One lakh twenty‐one thousand nine hundred three female nurses were included in this study. Binary Logistic regression analysis was done by SPSS Version 26.0. The youngest age group without night shift was used as the reference group. The odds ratio was calculated by different combinations of interaction items. Interaction coefficients were calculated by an Excel table designed by Andersson. Compared with the 18–25 year old ones without night shift, there existed an additive interaction between the age of 36–45 and more than 5–10 night shifts per month on hypertension prevalence. Odds ratio, the relative excess risk of interaction, the attributable proportion of interaction, and the synergy index and their 95% confidence intervals were 2.923(2.292‐3.727), 0.631(0.309‐0.954), 0.216(0.109‐0.323), 1.488(1.158‐1.913). Additive interaction was also found between the age of 36–45 and more than 10 night shifts per month. OR, RERI, API, SI, and their 95% confidence intervals were 3.430(2.273‐5.175) 1.037(0.061‐2.013), 0.303(0.089‐0.516), and 1.746(1.093‐2.788). There also existed an additive interaction between the age of 46–65 and more than 5–10 night shifts per month on hypertension prevalence. OR, RERI, API, SI, and their 95% confidence intervals were 7.398(5.595‐9.781) 1.809(0.880‐2.739), 0.245(0.148‐0.341), and 1.394(1.199‐1.622).There existed interaction between specific age groups and night shift frequency on the prevalence of hypertension among female nurses.

Night shifts and hypertension

“…In this regard, the paper in the present issue adds a further piece to existing knowledge on this matter. In a very large study, comprising over 100.000 female nurses from the Hebei province in China, the authors of this paper found an interaction between age and night shift frequency on the prevalence of hypertension 1 . Age was clearly associated with hypertension risk and so was a higher frequency of night shifts.…”

“…This issue of the Journal features a paper on the relationship between night shifts and the prevalence of hypertension among female nurses of different age groups. 1 This is an important topic as anyone who studies medicine or is involved in nursing will at some point be confronted with night shifts, either voluntarily or as part of the training program. For many representatives of older generations such night shifts form a normal part of the work and something that one should not worry or complain about.…”

“…In a very large study, comprising over 100.000 female nurses from the Hebei province in China, the authors of this paper found an interaction between age and night shift frequency on the prevalence of hypertension. 1 Age was clearly associated with hypertension risk and so was a higher frequency of night shifts. Compared to nurses without night work, the risk increased with more than 5 or 10 shifts per month, particularly in the older age group.…”

“…night shifts and the prevalence of hypertension among female nurses of different age groups. 1 This is an important topic as anyone who studies medicine or is involved in nursing will at some point be confronted with night shifts, either voluntarily or as part of the training program.…”

Preliminary Study on the Effect of a Night Shift on Blood Pressure and Clock Gene Expression

“…Figure 1a,b show 24 h blood pressure and Figure 1c,d show heart rates as assessed by two consecutive ambulatory blood pressure (BP) monitors (ABPMs), worn by all 25 internists. The first ABPM (Figure 1a,c; control = cnt) was worn on a day with a day shift at work (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and a night of rest, and the second one (Figure 1b,d, night shift = ns) was worn on a day with a day off from work, a night shift (20-08), and a subsequent period of rest (recovery time). The paired analysis of ABPM results showed that day diastolic blood pressure (DBP) and day heart rate (HR) were higher when physicians were at work (Figure 2b,c).…”