Covid-19 pandemic, an official statistical review has revealed.According to the Office for National Statistics (ONS), people identifying as Indian reported both greater difficulty with sleep over worry between 2019 and the initial period of lockdown until April this year and also had higher scores than other groups on a measure of self-reported mental health difficulties.Also Read | Why Dalit students are facing a fund crunch in India’s educational institutionsThe data released this week found that at the start of the UK-wide lockdown, across all ethnic groups, people reported an increased or persistent loss of sleep over worry.However, after adjusting for age, over one-third (36 per cent) of those from the Indian ethnic group reported.