Table 1 Neonatal and demographic characteristics at baseline of young adolescents enrolled in the RCT (n = 56), as well intervention group (IG) and waiting group (WG) comparisons.

From: The effect of a mindfulness-based intervention on executive, behavioural and socio-emotional competencies in very preterm young adolescents

 

RCT, n = 56

Intervention group (IG), n = 29

Waiting group (WG), n = 27

Group comparison (IG vs. WG)

Neonatal characteristics

Birth weight, mean (SD) [range] in grams

1284.83 (351.41) [650;1810]

1210 (400.85) [520;1980]

t(54) = 0.744, p = 0.460

Gestational age, mean (SD) [range] in days

29.29 (1.92) [24.71; 31.86]

29.12 (1.93) [26;31.71]

t(54) = 0.317, p = 0.753

Head circumference, mean (SD) [range] in cm

26.55 (2.57) [21;31]

25.65 (2.82) [21;31]

t(53) = 1.234, p = 0.223

Length of hospitalisation, mean (SD) [range] in days

59.56 (26.79) [23;131]

63 (33.69) [17;151]

t(52) = − 0.416, p = 0.679

Multiple births, n (%)

13 (44.8%)

7 (25.9%)

χ2(2) = 2.202, p = 0.333

cPVL, n(%)

1 (3.4%)

0

χ2(1) = 0.903, p = 0.342

IVH—Grades III and IV, n (%)

0 (0%)

0 (0%)

–

BPD, n (%)

5 (17.2%)

6 (22.2%)

χ2(1) = 0.534, p = 0.465

Demographic characteristics

Sex

 Female, n

14 (48.3%)

16 (59.3%)

χ2(1) = 0.678, p = 0.410

 Male, n

15 (51.7%)

11 (40.7%)

 

Age at baseline, mean (SD) [range] in years

12.05 (1.23) [10.08;14.24]

12.26 (1.37) [10.38;14.85]

t(50) = − 0.585, p = 0.561

Index of general ability (GAI), mean (SD) [range]

106.67 (11.47) [83;132]

108.76 (11.23) [87;130]

t(50) = − 0.664, p = .0.510

Socio-economic status (SES), mean (SD) [range]

4.78 (2.62) [2;12]

3.76 (2.35) [2;12]

t(50) = 1.470, p = 0.148

  1. Sex refers here to the individual's physical characteristics at birth associated with male or female. Independent-sample t-test, Chi-square was used to compare the randomised group.
  2. cPVL cystic periventricular leukomalacia, IVH Intraventricular haemorrhage, BPD Bronchopulmonary dysplasia.
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