How to eliminate NULL values from case statement?

I have the following query where I am trying to eliminate the NULL record.  How can I do this?  My query:

select
	AttendedSchoolLast3Months = case 
		when d.scrnval_id = 'AA5639E4-E60C-473F-9B72-354472C11F5B' and d.picklist_value = 'BC349A1E-65A1-4497-A38A-116C83B2028F' then 2 --No
		when d.scrnval_id = 'AA5639E4-E60C-473F-9B72-354472C11F5B' and d.picklist_value = 'A529C643-60A7-4D79-AC67-1A8F70791934' then 1 --Yes
		end
From [evolv_cs].[dbo].[test_header] [test_header_rv] WITH (NOLOCK)
CROSS APPLY [dbo].[fn_getTestSetupFormDetails](null, [test_header_rv].[test_setup_header_id]) AS [test_header]
CROSS APPLY [dbo].[fn_getTestSetupFormDetails]([test_header].[test_setup_details_id], null) AS [test_details]
JOIN [evolv_reports].[dbo].[test_details_answers_expanded_view] d WITH (NOLOCK) ON
		[test_header_rv].[test_header_id] = d.[test_header_id]
	AND [test_details].[test_setup_details_id] = d.[test_setup_details_id]
 join [user_defined_lut_rv] udl1 with(nolock) on udl1.[user_defined_lut_id] = d.picklist_value
join people_rv p (nolock) on d.people_id = p.people_id
where d.actual_date between '9/1/13' and '9/30/13'
and d.people_id = '7A9ACEE4-ABD5-4905-A54E-659A81048A1A' 

And the result currently is:

AttendedSchoolLast3Months
1
NULL

When I ran this query:

select distinct --attendedschoollast3months 
d.* 
From [evolv_cs].[dbo].[test_header] [test_header_rv] WITH (NOLOCK)
CROSS APPLY [dbo].[fn_getTestSetupFormDetails](null, [test_header_rv].[test_setup_header_id]) AS [test_header]
CROSS APPLY [dbo].[fn_getTestSetupFormDetails]([test_header].[test_setup_details_id], null) AS [test_details]
JOIN [evolv_reports].[dbo].[test_details_answers_expanded_view] d WITH (NOLOCK) ON
		[test_header_rv].[test_header_id] = d.[test_header_id]
	AND [test_details].[test_setup_details_id] = d.[test_setup_details_id]
 join [user_defined_lut_rv] udl1 with(nolock) on udl1.[user_defined_lut_id] = d.picklist_value
 --join [education_level] e (nolock) on e.[EducationLevel] = udl1.[description]
join people_rv p (nolock) on d.people_id = p.people_id
where d.actual_date between '9/1/13' and '9/30/13'
and d.people_id = '7A9ACEE4-ABD5-4905-A54E-659A81048A1A'

I get this:

event_log_id	people_id	group_profile_id	actual_date	test_header_id	test_setup_details_id	test_domains_info_id	question_caption	question_code	test_details_answers_id	update_log_id	test_details_id	numeric_value	scrnval_id	picklist_value	remarks	narrative	test_setup_details_answers_id	is_checked	date_value	details_type_code	test_setup_answers_caption	test_setup_answers_order	test_setup_answers_value	output_code	answers_category_id	answers_category	answers_category_code
24E8F88F-9648-4714-9394-D5A3F642C0F0	7A9ACEE4-ABD5-4905-A54E-659A81048A1A	NULL	2013-09-26 17:00:00.000	24E8F88F-9648-4714-9394-D5A3F642C0F0	67CDCF44-6308-4E15-8543-3C85DE4C6D4D	NULL	Attended school in the last 3 months	NULL	1BB75044-A65C-4464-ADB9-0CA991019907	7CDD1A4F-41F4-403C-A85E-7FF51B761FF0	3F04BBFF-8DE9-4283-842F-E53A536E3E46	NULL	AA5639E4-E60C-473F-9B72-354472C11F5B	A529C643-60A7-4D79-AC67-1A8F70791934	NULL	NULL	5979600C-B4E6-42DF-BF45-8AFF15ACDD7D	0	NULL	PICKLIST            	Click here for list	1	NULL	NULL	NULL	NULL	NULL
24E8F88F-9648-4714-9394-D5A3F642C0F0	7A9ACEE4-ABD5-4905-A54E-659A81048A1A	NULL	2013-09-26 17:00:00.000	24E8F88F-9648-4714-9394-D5A3F642C0F0	EBDFBCA5-6E57-4907-9DEF-A1E118F3AB2D	NULL	Highest grade completed	NULL	8F7F4644-4E67-4821-B0FC-A192389F994D	7CDD1A4F-41F4-403C-A85E-7FF51B761FF0	F6C59E67-EC74-4F0C-8EE8-AB372F22255D	NULL	4536DD06-871D-4FA7-BA8A-552DB2CA59BC	D77F0CAB-505E-4838-AECE-01BAAE8B8EB2	NULL	NULL	E7C9ECB7-7B40-4115-A6DB-BC752116D68D	0	NULL	PICKLIST            	Click here for list	1	NULL	NULL	NULL	NULL	NULL

Ryan D