Variable Label (VAR)	Variable Name	Category	N(%)	N(Missing)	Mean(SD)	Median(Q1,Q3)	Range of Values	
A1. Blind_ID	BLIND_ID			225(0)	476.87(269.52)	475.00(250.00,712.00)	2.00-919.00	
								
A2. Study visit	VISIT	Study visit 9 (age 6 years)	225(100.0)					
								
A3. Submission attempt number	SUBMISSION			225(0)	1.04(0.25)	1.00(1.00,1.00)	1.00-3.00	
								
B1. Patient's age (years) at 24 hour ECG start	PATIENT_AGE_START			225(0)	6.19(0.34)	6.15(6.01,6.35)	5.53-7.93	
								
B2.1. Time (hours) 24 hour ECG started	START_HR			225(0)	13.26(5.47)	13.00(9.00,18.00)	0.00-23.00	
								
B2.1. Time (minutes) 24 hour ECG started	START_MIN			225(0)	26.41(16.98)	26.00(13.00,40.00)	0.00-59.00	
								
B3. Patient's age (years) at 24 hour ECG stop	PATIENT_AGE_STOP			225(0)	6.19(0.34)	6.15(6.01,6.35)	5.53-7.93	
								
B4.1. Time (hours) 24 hour ECG stopped	STOP_HR			225(0)	13.16(5.64)	13.00(9.00,18.00)	0.00-23.00	
								
B4.2. Time (minutes) 24 hour ECG stopped	STOP_MIN			225(0)	25.99(16.90)	26.00(13.00,38.00)	0.00-59.00	
								
B5. Was the Holter data upload successful?	HOLT_UPLOAD	No	4(1.8)					
								
		Yes	221(98.2)					
								
C1. Was a symptom diary returned?	SYMPTOM_LOG	No	61(27.1)					
								
		Yes	164(72.9)					
								
C2.1. What time (hours) did the subject go to sleep?	SLEEP_HR			158(67)	19.03(4.78)	21.00(20.00,21.00)	1.00-24.00	
								
C2.2. What time (minutes) did the subject go to sleep?	SLEEP_MIN			104(121)	29.90(11.27)	30.00(25.00,35.50)	1.00-58.00	
								
C3.1. What time (hours) did the subject wake up?	WAKE_HR			157(68)	7.64(2.10)	7.00(7.00,8.00)	4.00-21.00	
								
C3.2. What time (minutes) did the subject wake up?	WAKE_MIN			157(68)	17.78(17.90)	15.00(0.00,30.00)	0.00-55.00	
								
C4. How many events were recorded?	SYMPTOM_NUM			157(68)	0.27(0.64)	0.00(0.00,0.00)	0.00-3.00	
								
C4a2. Symptom time: hours	SYMP_HR1			27(198)	11.78(5.95)	12.00(7.00,17.00)	2.00-22.00	
								
C4a3. Symptom time: hours	SYMP_HR2			14(211)	14.00(5.88)	15.00(8.00,18.00)	5.00-22.00	
								
C4a4. Symptom time: hours	SYMP_HR3			2(223)	12.00(0.00)	12.00(12.00,12.00)	12.00-12.00	
								
C4a2. Symptom time: minutes	SYMP_MIN1			27(198)	19.93(16.86)	25.00(0.00,30.00)	0.00-53.00	
								
C4a3. Symptom time: minutes	SYMP_MIN2			14(211)	11.14(15.11)	0.00(0.00,30.00)	0.00-41.00	
								
C4a4. Symptom time: minutes	SYMP_MIN3			2(223)	31.00(1.41)	31.00(30.00,32.00)	30.00-32.00	
								
C4b2. Symptom	SYMPTOM1			()	()	(,)	-	
								
C4b3. Symptom	SYMPTOM2			()	()	(,)	-	
								
C4b4. Symptom	SYMPTOM3			()	()	(,)	-	
								
C4c2. Activity	SYMP_ACT1			()	()	(,)	-	
								
C4c3. Activity	SYMP_ACT2			()	()	(,)	-	
								
C4c4. Activity	SYMP_ACT3			()	()	(,)	-