Table 2.

Age of diagnosis by select patient characteristics

Total
N
<1 mo
N (%)
1-6 mo
N (%)
7-12 mo
N (%)
13-23 mo
N (%)
P value
All patients  836 625 (74.8) 109 (13.0) 79 (9.5) 23 (2.8)  
HA 655 495 (75.6) 83 (12.7) 60 (9.2) 17 (2.6) .7738 
HB 181 130 (71.8) 26 (14.4) 19 (10.5) 6 (3.3)  
Mild 123 85 (69.1) 22 (17.9) 11 (8.9)   .0188 
Moderate 179 132 (73.7) 22 (12.3) 17 (9.5) 8 (4.5)  
Severe 525 404 (77.0) 61 (11.6) 51 (9.7) 9 (1.7)  
Unknown 4 (-) 4 (-)     
Positive FH 584 472 (80.8) 70 (12.0) 30 (5.1) 12 (2.1) <.0001 
Negative FH 226 138 (61.1) 35 (15.5) 44 (19.5) 9 (4.0)  
Unknown FH 26 15 (-)        
Total
N
<1 mo
N (%)
1-6 mo
N (%)
7-12 mo
N (%)
13-23 mo
N (%)
P value
All patients  836 625 (74.8) 109 (13.0) 79 (9.5) 23 (2.8)  
HA 655 495 (75.6) 83 (12.7) 60 (9.2) 17 (2.6) .7738 
HB 181 130 (71.8) 26 (14.4) 19 (10.5) 6 (3.3)  
Mild 123 85 (69.1) 22 (17.9) 11 (8.9)   .0188 
Moderate 179 132 (73.7) 22 (12.3) 17 (9.5) 8 (4.5)  
Severe 525 404 (77.0) 61 (11.6) 51 (9.7) 9 (1.7)  
Unknown 4 (-) 4 (-)     
Positive FH 584 472 (80.8) 70 (12.0) 30 (5.1) 12 (2.1) <.0001 
Negative FH 226 138 (61.1) 35 (15.5) 44 (19.5) 9 (4.0)  
Unknown FH 26 15 (-)        

Responses of “Unknown” are shown but not included in the denominator for percentage calculations or in the statistical analyses.

P values result from χ2 test for age of diagnosis distribution across the respective patient characteristics.

Forty-seven patients with unknown age of diagnosis were excluded from the table.

For known values (except in instances where complementary suppression is necessary), data are not shown for fields with N ≤ 5 to protect patient confidentiality. Additional cells may be suppressed to prevent derivation of these counts by subtraction.

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