Zhao B, Li J, Liu J, et al. - Researchers conducted this cross-sectional analysis to assess the impact of the frequency as well as pattern of night shift on hypertension risk and the interaction of them among female nurses. This study involved 84,697 female nurses in 13 cities in China. A significantly more probability to suffer from hypertension was observed in relation to having more than 5 to 10 or more than 10 night shifts per month but not in relation to having less than or equal to 5 night shifts per month. The patterns of night shift were all linked with a higher likelihood of hypertension and there was a lower OR (1.14) in participants engaging in rapidly rotating night shift relative to those having slowly rotating night shift (1.23) and permanent night shift (1.46). Findings demonstrated an association between frequency as well as pattern of night shift and the risk of hypertension in female nurses and there was no significant interaction between them.