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Fig. 2 | BMC Urology

Fig. 2

From: Appropriate timing of performing abdominal ultrasonography and termination of follow-up observation for antenatal grade 1 or 2 hydronephrosis

Fig. 2

Rate of time to worsening of hydronephrosis in grade 1 or 2. Kaplan–Meier method. Points displayed as crosses shows censored cases. The upper table in this figure shows the number of affected patients at risk at each observational point. The lower table in this figure shows the rate (%) of worsening of hydronephrosis at each observational point. The rate of worsening of hydronephrosis was significantly higher in grade 1 than grade 2 (log-rank test, χ2 = 6.227, P = 0.013). There were 14.6% of grade 1 and 2.8% of grade 2 cases increased in grade. Then, 99.3% of these cases worsened within the first 6 months, only one case of grade 1 worsened at the 13 months over the study period

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BMC Urology

ISSN: 1471-2490

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