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Table 1 Comparison of the “pre-NHSP implementation” and “post-NHSP implementation” cohorts by demographic and obstetric characteristics

From: Assessing and monitoring the impact of the national newborn hearing screening program in Israel

Characteristics of samples 2007-2009
N= 431a
2010-2012
N=428a
Z scores & T tests
Female 47% 46.2% p = .841
Jews and othersb 77.7% 66.8% p = 0.0002
Arabs 22.3% 33% p < 0.0005
Mean birthweight (grams) 2964 2936 p = .627
Mean gestational age (weeks) 38.2 38.0 p = .334
Extremely preterm (< 28 weeks) 2.2% 2.5% p = .578
Moderately preterm (28-36 weeks) 14.5% 17% p = .679
Severity of hearing disorder
Unilateral n = 54 n = 21  
 Mild 1% 0  
 Moderate 6% 2%  
 Profound 6% 3%  
Bilateral n = 343 n = 243  
 Mild 7% 10%  
 Moderate 29% 28%  
 Profound 43% 50%  
  1. amissing data are not included in calculations
  2. bothers are non-Arab minorities and cases with “unknown” population group