'Can someone help me in convert this MySql query to sequelize?

I am new to sequelize. I am not sure how to convert this MySql query so that I can use it in my node.js file.

MySql query:

SELECT Rtrim(Ltrim(childstatus)),TIMESTAMPDIFF(d,dob,now(3)) 
INTO @childstatus, @Ageday 
FROM childdetails where registno=@registno

I have sequelize model for childdetails. I am not sure how to structure this query.

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