表 5.
3组间安氏Ⅱ类、Ⅲ类发生率比较 例(%)
| A组 | B组 | C组 | |
| a，b表示在0.05层次上2组间比较差异无统计学意义。 | |||
| 安氏Ⅰ类 | 20a(40.8) | 19a(36.5) | 6b(12.0) |
| 安氏Ⅱ类 | 24a(49.0) | 6b(11.5) | 20a(40.0) |
| 安氏Ⅲ类 | 5a(10.2) | 27b(51.9) | 24b(48.0) |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.