The number of Indians in the middle class, or those earning between $10 and $20 a day, shrunk by about 32 million, compared with the number that could have been reached in the absence of a pandemic, the Pew Research Centre said.
Some regions in India have already reimposed containment measures, including lockdowns and restaurant closures, and more are being considered.
"We have to adopt a balanced policy where the spread of the virus can be prevented and where the poor man and the country's economy are least affected," Imran told a national coordinating committee meeting.
The region is the latest to impose restrictions after similar lockdowns or curfews in many parts of India, which is in the middle of a massive second wave of infections that has swamped its health system.
The prime minister said he was not imposing a lockdown for now but that he would close down cities if Pakistan started facing a situation line in neighbouring India,
"Our results are important in this context because they show that being able to spend time outdoors under conditions of lockdown has a beneficial impact on psychological well being," said co-lead author Viren Swami, Professor of Social Psychology at Anglia Ruskin University.
Prime Minister Boris Johnson announced the lockdown late on Monday saying the highly contagious new coronavirus variant first identified in Britain was spreading so fast it risked overwhelming the National Health Service (NHS) within 21 days.
Johnson is facing a stream of allegations in newspapers — all of them denied — about everything from his muddled initial handling of the COVID-19 crisis to questions over who financed the redecoration of his official apartment.
Women were especially worse-off, with a staggering 47 per cent of female workers unable to secure employment even after virus restrictions were lifted, according to the study published on Thursday.