Blar i Bergen Open Research Archive på forfatter "Colman, Ian"
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Differential associations between types of social media use and university students' non-suicidal self-injury and suicidal behavior
Kingsbury, Mila; Reme, Bjørn-Atle; Skogen, Jens Christoffer; Sivertsen, Børge; Øverland, Simon Nygaard; Cantor, Nathan; Hysing, Mari; Petrie, Keith; Colman, Ian (Journal article; Peer reviewed, 2021)Objective To examine differential associations between types of social media use and non-suicidal self-injury (NSSI) and suicidal behaviors. Methods Participants were N = 40,065 Norwegian college and university students, ... -
Early Puberty Is Associated With Higher Academic Achievement in Boys and Girls and Partially Explains Academic Sex Differences
Torvik, Fartein Ask; Flatø, Martin; McAdams, Tom A.; Colman, Ian; Silventoinen, Karri; Stoltenberg, Camilla (Journal article; Peer reviewed, 2021-03-29)Purpose On average, boys have lower academic achievement than girls. We investigated whether the timing of puberty is associated with academic achievement, and whether later puberty among boys contributes to the sex ... -
Population attributable fractions for Type 2 diabetes: an examination of multiple risk factors including symptoms of depression and anxiety
Naicker, Kiyuri; Manuel, Douglas; Øverland, Simon Nygaard; Skogen, Jens Christoffer; Johnson, Jeffrey A; Sivertsen, Børge; Colman, Ian (Peer reviewed; Journal article, 2018-11-22)Background: Population attributable fractions (PAFs) are frequently used to quantify the proportion of Type 2 diabetes cases due to single risk factors, an approach which may result in an overestimation of their individual ... -
Seasonality and symptoms of depression: A systematic review of the literature
Øverland, Simon Nygaard; Woicik, Wojtek; Sikora, Lindsey; Whittaker, Kristoffer; Heli, Hans; Skjelkvåle, Fritjof Stein; Sivertsen, Børge; Colman, Ian (Peer reviewed; Journal article, 2019-04-22)Aims: Lay opinions and published papers alike suggest mood varies with the seasons, commonly framed as higher rates of depression mood in winter. Memory and confirmation bias may have influenced previous studies. We therefore ...