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Table 2 Sample description in 2- and 3-year-old children

From: Predictors of screen viewing time in young Singaporean children: the GUSTO cohort

  Subsample assessed at 2 years (n = 861) Subsample assessed at 3 years (n = 861)
Child age, months 24.4 ± 0.9 36.5 ± 1.1
Study centre
 KKH 654 (76.0) 651 (75.6)
 NUH 207 (24.0) 210 (24.4)
Ethnicity   
 Chinese 490 (56.9) 492 (57.1)
 Malay 220 (25.6) 219 (25.4)
 Indian 151 (17.5) 150 (17.4)
Child sex
 Male 457 (53.1) 461 (43.5)
 Female 404 (46.9) 400 (46.5)
Birth order
 First-born 383 (44.5) 387 (45.0)
 Second- or later-born 478 (55.5) 474 (55.1)
Monthly household incomes
 < 2000 SGD 123 (14.3) 126 (14.6)
 2000-3999 SGD 262 (30.4) 253 (29.4)
 4000-5999 SGD 218 (25.3) 212 (24.6)
 ≥ 6000 SGD 258 (30.0) 270 (31.4)
Accommodation type
 Public housing 786 (91.3) 787 (91.4)
 Private 75 (8.7) 74 (8.6)
Maternal place of birth
 Singapore 539 (62.6) 542 (63.0)
 Abroad 322 (37.4) 319 (37.1)
Maternal age
 < 25 years 83 (9.6) 82 (9.5)
 25-29 years 263 (30.6) 259 (30.1)
 30-34 years 279 (32.4) 283 (32.9)
 ≥ 35 years 236 (27.4) 237 (27.5)
Maternal education
 University 300 (34.8) 309 (35.9)
 Post-secondary 302 (35.1) 294 (34.2)
 Primary or Secondary 259 (30.1) 258 (30.0)
Maternal BMI before pregnancy, kg/m2 22.8 ± 4.4 22.8 ± 4.4
Maternal tobacco consumption before pregnancy
 Yes 92 (10.7) 89 (10.3)
 No 769 (89.3) 772 (89.7)
Maternal alcohol consumption before pregnancy
 Yes 295 (34.3) 297 (34.5)
 No 566 (65.7) 564 (65.5)
Maternal physical activity level before pregnancy
 Insufficiently active 281 (32.9) 286 (33.5)
 Sufficiently active 419 (49.1) 418 (48.9)
 Highly active 153 (17.9) 151 (17.7)
 Missing, n 8 6
Maternal daily television-viewing time
 < 1 h 152 (17.7) 154 (17.9)
 1-2 h 237 (27.5) 235 (27.3)
 2-3 h 187 (21.7) 195 (22.7)
 ≥ 3 h 285 (33.1) 277 (32.2)
Maternal marital status
 Married 829 (97.1) 828 (97.1)
 Single/divorced 25 (2.9) 25 (2.9)
 Missing, n 7 8
Paternal age
 < 30 years 164 (22.0) 156 (21.5)
 30-34 years 243 (32.6) 235 (32.3)
 35-39 years 209 (28.0) 207 (28.5)
 ≥ 40 years 130 (17.4) 129 (17.7)
 Missing, n 115 134
Paternal education
 University 279 (39.0) 277 (39.6)
 Post-secondary 157 (22.0) 151 (21.6)
 Primary or Secondary 279 (39.0) 272 (38.9)
 Missing, n 146 161
Paternal BMIa, kg/m2 25.7 ± 4.5 25.9 ± 4.8
Paternal daily television-viewing time
 < 1 h 235 (32.9) 236 (33.7)
 1-2 h 268 (37.5) 256 (36.6)
 2-3 h 102 (14.3) 103 (14.7)
 ≥ 3 h 110 (15.4) 105 (15.0)
 Missing, n 146 161
  1. Values are Mean ± SD or % (n) for continuous and categorical variables, respectively
  2. aMissing data: 63 and 61 at in 2-year and 3-year samples, respectively