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Table 2 Sociodemographic profile of the subjects

From: A pilot study to determine the short-term effects of milk with differing glycaemic properties on sleep among toddlers: a randomised controlled trial

Characteristics (n = 56) LGI n (%) HGI n (%) Total n (%)
Age (months)
14–18 11 (39.3) 14 (51.9) 24 (43.6)
19–24 17 (60.7) 13 (48.1) 31 (56.4)
Mean ± S.D. 20.46 ± 3.8 19.30 ± 4.7 19. 9 ± 4.3
Sex
Male 10 (34.5) 11 (40.7) 21 (37.5)
Female 19 (65.5) 16 (59.3) 35 (62.5)
Ethnicity
Malay 27 (96.4) 27(96.4) 54 (96.4)
Others 1 (3.6) 1(3.6) 2 (3.6)
Mother’s age (years)(n=47)
≤30 18 (62.1) 14 (51.9) 32 (57.1)
31–35 7 (24.2) 8 (29.6) 15 (26.8)
Mean ± S.D. 30.5 ± 4.1 31.30 ± 4.3 30. 9 ± 4.1
Father’s age (years) (n = 54)
≤30 8 (29.6) 12 (44.5) 20 (37.0)
31–35 12 (44.5) 5 (18.5) 17 (31.5)
>36 7(25.9) 10(37.0) 17 (31.5)
Mean ± S.D. 32.8 ± 4.4 33.8 ± 6.1 33.3 ± 5.3
Mother’s education (n = 56)
Secondary 9 (31.0) 5(18.5) 14(25.0)
College/University 20 (69.0) 22 (81.5) 42 (75.0)
Father’s education (n = 54)
Secondary 7 (25.9) 4(14.8) 11(20.4)
College/University 20 (74.1) 23 (85.2) 43 (79.6)
Mother’s occupation [53] (n = 55)
Managers and professionals 4 (13.8) 10 (38.4) 14 (25.4)
Technicians/Associate professionals 14 (48.3) 6 (23.2) 20 (36.4)
Clerical support workers 10 (34.5) 8 (30.8) 18 (32.7)
Service and sales workers 0 (0.0) 1 (3.8) 1 (1.8)
Business owner 1 (3.4) 1 (3.8) 2 (3.7)
Father’s occupation [53] (n = 52)
Managers and professionals 7 (25.9) 6 (24.0) 13 (25.0)
Technicians and associate professionals 11 (40.8) 13 (52.0) 24 (46.1)
Clerical support workers 2 (7.4) 1 (4.0) 3 (5.8)
Service and sales workers 3 (11.1) 0 (0.0) 3 (5.8)
Plant and machine operators and Assemblers/ Elementary occupations 2 (7.4) 2(8.0) 4 (7.7)
Business owner 2 (7.4) 3 (12.0) 5 (9.6)
Household monthly income (n = 56)
<4000 12(41.4) 7(26.0) 19(34.0)
RM4000 – 5999 7 (24.1) 9 (33.3) 16 (28.6)
RM6000 – 7999 7 (24.1) 7 (25.9) 14 (25.0)
≥RM8000 3 (10.4) 4 (14.8) 7 (12.4)
Number of siblings (n = 55)
No siblings 1 (3.4) 1 (3.8) 2 (3.6)
1–2 15 (51.7) 17 (65.4) 32 (58.3)
3–4 11 (37.9) 8 (30.8) 19 (34.5)
≥5 2 (6.9) 0 (0.0) 2 (3.6)
Child’s Birth Weight (kg) (n = 53)
Low birth weight [37] (<2.5) 1 (3.4) 2 (8.3) 3 (5.7)
Normal birth weight (2.5–3.99) 27 (93.2) 22 (91.7) 49 (92.4)
High birth weight (≥4.00) 1 (3.4) 0 (0.0) 1 (1.9)
Mean ± S.D. 3.1 ± 0.4 3.00 ± 0.5 3.1 ± 0.4
  1. MASCO [53], Principles of Classification of Occupations (3rd Ed.). Putrajaya: Ministry of Human Resources
  2. UNICEF and WHO [36]