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Table 2 Socio-demographic characteristics of the participants

From: Behavioral intervention for sleep problems in childhood: a Brazilian randomized controlled trial

Characteristics of the child Control g. N = 31 Intervention g. N = 31 Z Total N = 62
Mean age (SD) 2.1 (1.2) 2.5 (1.4) 1.20 Z 2.3 (1.3)
Age, N (%) Z = Z test  
12–42 months (1–3½ years), N (%) 23 (74%) 22 (71%) 0.28 45 (73%)
43–60 months (3½–5 years), N (%) 08 (26%) 09 (29%) 0.28 17 (27%)
Gender, N (%)
 Male 16 (52%) 18 (58%) 0.51 34 (55%)
 Female 15 (48%) 13 (42%) 0.51 28 (45%)
Characteristics of the mother Control g. N = 28 Intervention g. N = 26 Z Total N = 54
Mean age (SD) 34.42 (6.0) 32.15 (5.2) 1.47 Z 33.3 (5.7)
Age, N (%) Z = Z test  
20–29 years, N (%) 7 (25%) 7 (27%) 0.16 14 (26%)
30–39 years, N (%) 16 (57%) 17 (65%) 0.62 33 (61%)
40–49 years, N (%) 5 (18%) 2 (8%) 1.11 7 (13%)
Marital status
 Single 1 (3%) 2 (8%) 0.6 3 (6%)
 Married 24 (86%) 21 (81%) 0.48 45 (83%)
 Separated 3 (11%) 3 (11%) 0.09 6 (11%)
Education, N (%)
 Higher edu. 14 (50%) 20 (77%) 2.04* 34 (63%)
 High school 11 (39%) 6 (23%) 1.28 17 (31%)
 Elementary 3 (11%) 1.71 3 (6%)
Social stratum, N (%)
 High 5 (18%) 14 (54%) 2.76* 19 (35%)
 Medium 18 (64%) 11 (42%) 1.61 29 (54%)
 Low 5 (18%) 1 (4%) 1.63 6 (11%)
Maternal mental health
 Total problem ASR 58.0 (8.6) 58.7 (8.4) 0.30 58.35 (8.5)
  1. *p < 0.05
  2. ASR Adult Self Report