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Table 1 Sample characteristics of Portuguese children participating in the study (2016/2017, n = 8430)

From: Social inequalities in traditional and emerging screen devices among Portuguese children: a cross-sectional study

 N (%)3–5 years6–10 yearsp-value
Age
 3–5 years2397 (28.4)N.A.N.A.N.A.
 6–10 years6033 (71.6)N.A.N.A.N.A.
Gender
 Males4280 (50.8)1238 (51.6)3042 (50.4)0.30
 Females4150 (49.2)1159 (48.4)2991 (49.6)
SEP
 Low1800 (24.9)476 (22.6)1324 (25.9)0.01
 Medium2705 (37.5)813 (38.6)1892 (37.0)
 High2714 (37.6)817 (38.8)1897 (37.1)
  1. Legend. SES: socioeconomic position was calculated by father education level - low (less than 9 years), medium (10 to 12 years), high (university degree); p-values calculated by Chi-Square Tests