SQL Dynamic stored procedure issue

I am writing a stored procedure to be a dynamic sql. I am not finished but am having errors so far.

Below is my code and i am getting two errors. error with syntax near ',' and incorrect syntax near the keyword 'else'

USE [med]
/****** Object:  StoredProcedure [dbo].[insertupdatedem]    Script Date: 04/11/2015 16:12:14 ******/
ALTER procedure [dbo].[insertupdatedem]

@mrn int,
@lastname nvarchar(50) =null,
@firstname nvarchar(50)=null,
@address1 nvarchar(50)=null,
@city nvarchar(50)=null,
@state nvarchar(50)=null,
@dob datetime=null,
@ssn nvarchar(50)=null,
@marital nvarchar(50)=null,
@gender nvarchar(1)=null,
@zip nvarchar(50)=null,
@sqlquery nvarchar(500),
@sqlselect nvarchar(500)



set nocount on

if exists(select 1 from med.dbo.demographics where lastname=@lastname and dob=@dob and ssn=@ssn)
set @sqlquery = 'update med.dbo.demographics set dob=' + @dob + ' ,ssn=' + @ssn + ',gender='+@gender+',marital='+@marital+',address1='+@address1+',city='+@city+',[state]='+,@state+',zip='+@zip
execute @sqlquery;


insert into med.dbo.demographics(mriid,dob,ssn,gender,marital,address1,city,[state],zip)
insert into med.dbo.primarymrn(firstname,lastname)
values(@firstname, @lastname)


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Mike EghtebasDatabase and Application DeveloperCommented:
add ; at the end of line 39

Scott PletcherSenior DBACommented:
Change "+,@state" to "+@state" (remove the extra comma):

set @sqlquery = 'update med.dbo.demographics set dob=' + @dob + ' ,ssn=' + @ssn + ',gender='+@gender+',marital='+@marital+',address1='+@address1+',city='+@city+',[state]='+@state+',zip='+@zip

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Vitor MontalvãoMSSQL Senior EngineerCommented:
desiredforsome, do you still need help with this question?
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Microsoft SQL Server 2005

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