Person time and rate ratios

[@TW-nz7cx]

Very straight forward and easy to understand. I have the general concept now. Thank you.

[@maxwell6898]

Thanks man, was reading an epidemiological study and had no idea what this meant

[@capliceatta5146]

Thanks prof

[@paramveersingh8707]

i loved watching the video, thanks for your help! :)

[@BB-cg1er]

How to calculate person-years if a person has less than one year follow-up?

[@anthea3947]

Use the fraction of year maybe, like 6 months will be 0.5 years

[@tloujonasngoetjana712]

How did you calculate the incidence rate in the unexposed group?

[@tayloryoung4239]

I think same way the he did it but using the black X’s instead of the blue X’s