Table 1 Socio-demographic characteristics of 1370 adolescents in public middle schools in Kuwait.

From: Season of birth and sugary beverages are predictors of Raven’s Standard Progressive Matrices Scores in adolescents

Characteristics

Age in years, Mean (SD) years

12.40

(0.93)

 

n

(%)

Gender

   Male

674

(49.2)

Nationality

   Kuwaiti

1,047

(76.42)

   Non-Kuwait

323

(23.58)

Father’s Educationa

   No formal education

15

(1.12)

   Primary/Intermediate

215

(16.08)

   Secondary (high school)

330

(24.68)

   Diploma

251

(18.77)

   University & above

526

(39.34)

Mother’s Educationb

   No formal education

31

(2.30)

   Primary/Intermediate

145

(10.74)

   Secondary (high school)

294

(21.78)

   Diploma

293

(21.70)

University & above

587

(43.48)

Father’s Incomec (Kuwaiti Dinars)

   Less than 500

89

(6.72)

   500 to 1000

291

(21.98)

   1001 to 1500

414

(31.27)

   1501 to 2000

213

(16.09)

   More than 2000

164

(12.39)

   Do not wish to tell

153

(11.56)

Mother’s Employment Statusd

   Housewife

466

(34.72)

   Paid employment

664

(49.48)

   Others

212

(15.80)

Housinge

   Rented flat

499

(36.94)

   Rented house

159

(11.77)

   Owned flat

55

(4.07)

   Owned house

638

(47.22)

  1. aMissing for 33 participants; bMissing for 20 participants; cMissing for 46 participants; dMissing for 28 participants; eMissing for 19 participants.