Direction and magnitude of social jetlag are associated with obesity: Results from a sample of hospital employees

Social jetlag and obesity: A systematic review and meta‐analysis

“…However, two studies investigated the link between social jetlag and obesity in both children/adolescents and adults 9,64 . The included studies were conducted in the United States, 10,12,15,19,27,43,44,48,50,52,56,62 United Kingdom, 52 Egypt, 31 Thailand, 53 Turkey, 11,46 Brazil, 17,29,54 the Netherlands, 13,23,62 Czech Republic, 30 Korea, 14,56,59 Japan, 57 Germany, 9,45 Norway, 58 China, 16,20,64 Taiwan, 60 Hong Kong, 48 New Zealand, 22,28,44,50 Iceland, 18 Finland, 32 and Spain 63 . Thirty‐six citations were cross‐sectional in design, 9–12,14–20,23,27–32,42–44,48–56,58–60,62–64 six were longitudinal, 13,22,45,47,57,61 and one was case‐control 46 .…”

“…The included studies were conducted in the United States, 10,12,15,19,27,43,44,48,50,52,56,62 United Kingdom, 52 Egypt, 31 Thailand, 53 Turkey, 11,46 Brazil, 17,29,54 the Netherlands, 13,23,62 Czech Republic, 30 Korea, 14,56,59 Japan, 57 Germany, 9,45 Norway, 58 China, 16,20,64 Taiwan, 60 Hong Kong, 48 New Zealand, 22,28,44,50 Iceland, 18 Finland, 32 and Spain 63 . Thirty‐six citations were cross‐sectional in design, 9–12,14–20,23,27–32,42–44,48–56,58–60,62–64 six were longitudinal, 13,22,45,47,57,61 and one was case‐control 46 . Thirty‐seven studies were conducted in the general population, 9–20,22,23,27,28,30,32,42–52,54,55,58,59,61–64 two in patients with metabolic syndrome, 31,57 two in healthy workers, 29,60 one in patients with prediabetes, 53 and one in shift‐working nurses…”

“…Thirty‐six citations were cross‐sectional in design, 9–12,14–20,23,27–32,42–44,48–56,58–60,62–64 six were longitudinal, 13,22,45,47,57,61 and one was case‐control 46 . Thirty‐seven studies were conducted in the general population, 9–20,22,23,27,28,30,32,42–52,54,55,58,59,61–64 two in patients with metabolic syndrome, 31,57 two in healthy workers, 29,60 one in patients with prediabetes, 53 and one in shift‐working nurses 56 . Anthropometric indices were measured in the clinical setting in 30 studies 10–13,15,17–19,22,23,27–29,31,32,42,44–48,52–54,57–62 and were self‐reported in 11 studies, 9,14,16,30,43,49–51,55,56,63 whereas the rest did not report the approach 20,64 .…”

“…Thirty‐seven studies were conducted in the general population, 9–20,22,23,27,28,30,32,42–52,54,55,58,59,61–64 two in patients with metabolic syndrome, 31,57 two in healthy workers, 29,60 one in patients with prediabetes, 53 and one in shift‐working nurses 56 . Anthropometric indices were measured in the clinical setting in 30 studies 10–13,15,17–19,22,23,27–29,31,32,42,44–48,52–54,57–62 and were self‐reported in 11 studies, 9,14,16,30,43,49–51,55,56,63 whereas the rest did not report the approach 20,64 . To measure social jetlag, 17 studies utilized open questions, 11,15–17,28,31,32,48–53,55,57,59,63 15 utilized Munich ChronoType Questionnaire (MCTQ), 9,13,14,20,22,23,29,30,43,45,54,56,58,60,62 10 utilized actigraphy, 10,12,18,19,27,42,44,47,61,64 and one utilized Childhood Chronotype Questionnaire (CCQ) 46 (Table 1).…”

“…Twenty‐nine citations (17 publications) with a total of 123,509 subjects investigated the link between social jetlag and the risk of having overweight/obesity 9,12,15–17,20,22,29,32,43,48,51,54–56,60,61 . Social jetlag was significantly associated with higher odds of having overweight/obesity (OR: 1.20; 95% CI, 1.02, 1.40; P = 0.039).…”