Table 1 Prevalence of CHD in schoolchildren in high altitude region
From: Prevalence of congenital heart disease among school children in Qinghai Province
Total | Non-CHDN (‰) | CHDN (‰) | P value | |
|---|---|---|---|---|
All | 43,562 | 43,269 (993) | 293 (7) | |
Gender | 0.001 | |||
Male | 21,664 | 21,546 (995) | 118 (5) | |
Female | 21,898 | 21,723 (992) | 175 (8) | |
Race | 0.029 | |||
Tibetan | 35,064 | 34,830 (993) | 234 (7) | |
Mongol | 5070 | 5034 (993) | 36 (7) | |
Han | 495 | 486 (982) | 9 (18) | |
Hui | 1830 | 1818 (993) | 12 (7) | |
Sala | 212 | 212 (100) | 0 (0) | |
Tujia | 828 | 826 (998) | 2 (2) | |
Others | 63 | 63 (100) | 0 (0) | |
County | < 0.001 | |||
Jianzha (1990 m) | 8457 | 8418 (995) | 39 (5) | |
Tongren (2480 m) | 12,009 | 11,978 (997) | 31 (3) | |
Henan (3510 m) | 5307 | 5268 (993) | 39 (7) | |
Zeku (3655 m) | 12,456 | 12,341 (991) | 115 (9) | |
Qumalai (4223 m) | 5333 | 5264 (987) | 69 (13) | |
Age at diagnosis of CHD | < 0.001 | |||
≤ 6 years | 1740 | 1687 (970) | 53 (30) | |
6–12 years | 26,510 | 26,364 (994) | 146 (6) | |
> 12 years | 15,312 | 15,218 (994) | 94 (6) | |
Altitude | < 0.001 | |||
≤ 4200 m | 38,229 | 38,005 (994) | 224 (6) | |
> 4200 m | 5333 | 5264 (987) | 69 (13) |