Results The regular antenatal examination rate for pregnant women was significantly lower in altitude group than in plain group(10.34% vs 94.67%, P<0.01).
结果 高原组产妇孕期定期产前检查率（10.34%） 显著低 于平原组（94.67%），P<0.01 ；
There were significant differences in changes of main clinical symptoms, physical signs and cumulative scores for examination of fiber-colonoscopy (P< 0. 05 or P<0. 01) between two groups.
两组主要临床症状、体征及纤维结肠镜复查积分变化比较差异有显著性（P<0.05或P<0.01）。
Imaging examination ( CT or X-ray) of 97ears showed poor pneumatization of mastoids and there was a significant difference between involved group and control group( P< 0.01).
其中97耳CT及X线摄片结果显示，乳突气化不良程度与对照组有差异（P<0.01）。
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