Table 1 Characteristics of the children who participated in the six-year follow-up survey.
Characteristics (n = 1202) | Number (%)/ mean (standard deviation) | ||
|---|---|---|---|
Demographics | |||
Sex | Male | 610 (50.8) | |
Female | 592 (49.3) | ||
Age (years old) | 6.7 (0.2) | ||
Body weight (kg) | 25.9 (5.8) | ||
Body weight | |||
25 kg or more | 568 (47.3) | ||
less than 25 kg | 634 (52.8) | ||
Body height (cm) | 119.7 (5.9) | ||
Perinatal information | |||
Mode of delivery | |||
Vaginal | 688 (57.2) | ||
Caesarean section | 514 (42.8) | ||
Birthweight (g) | 3267.9 (411.5) | ||
Birthweight | |||
>=2500 g | 1175 (97.8) | ||
<2500 g | 27 (2.3) | ||
Gestational age at birth (weeks) | 39.6 (1.2) | ||
Gestational age at birth | |||
>=37 weeks | 1166 (97.0) | ||
<37 weeks | 36 (3.0) | ||
Light-for-dates | 129 (10.7) | ||
Family history | |||
Mother’s age at child’s birth | |||
24 years or less | 312 (26.0) | ||
25–34 years | 728 (60.6) | ||
35 years or more | 162 (13.5) | ||
(n = 1201) | Maternal history of asthma and allergic diseases | ||
Yes | 96 (8.0) | ||
No | 1105 (92.0) | ||
(n = 1201) | Maternal history of asthma | ||
Yes | 12 (1.0) | ||
No | 1189 (99.0) | ||
(n = 1201) | Maternal history of atopic eczema | ||
Yes | 13 (1.1) | ||
No | 1188 (98.9) | ||
(n = 1201) | Maternal history of rhinitis | ||
Yes | 76 (6.3) | ||
No | 1125 (93.7) | ||
(n = 1191) | Paternal history of asthma and allergic diseases | ||
Yes | 47 (4.0) | ||
No | 1144 (96.1) | ||
(n = 1191) | Paternal history of asthma | ||
Yes | 9 (0.8) | ||
No | 1182 (99.2) | ||
(n = 1191) | Paternal history of atopic eczema | ||
Yes | 5 (0.4) | ||
No | 1186 (99.6) | ||
(n = 1191) | Paternal history of rhinitis | ||
Yes | 33 (2.8) | ||
No | 1158 (97.2) | ||
(n = 1201) | Maternal education level | ||
No or primary school | 152 (12.7) | ||
Secondary school | 403 (33.5) | ||
High school | 399 (33.2) | ||
College or university | 248 (20.6) | ||
Environmental status | |||
Number of siblisngs | |||
0 | 276 (23.0) | ||
1 | 781 (65.0) | ||
2 | 112 (9.3) | ||
3+ | 33 (2.8) | ||
Vigorous physical activity | |||
Never or occasionally | 1023 (85.1) | ||
Once or twice per week | 130 (10.8) | ||
Three or more times a week | 49 (4.1) | ||
Watch television | |||
Less than 1 hour | 199 (16.6) | ||
1 hour but less than 3 hours | 672 (55.9) | ||
3 hours but less than 5 hours | 189 (15.7) | ||
5 hours or more | 142 (11.8) | ||
Fuel for cooking | |||
Electricity | 84 (7.0) | ||
Gas | 1078 (89.7) | ||
Open fires | 7 (0.6) | ||
Others | 33 (2.8) | ||
Paracetamol use in the first 12 months of life | |||
Yes | 1049 (87.3) | ||
No | 153 (12.7) | ||
Paracetamol use in the past 12 months | |||
Never | 267 (22.2) | ||
at least once a year | 767 (63.8) | ||
at least once per month | 168 (14.0) | ||
Antibiotics in the first 12 months | |||
Yes | 876 (72.9) | ||
No | 326 (27.1) | ||
Trucks pass through the street | |||
Never | 512 (42.6) | ||
Seldom | 324 (27.0) | ||
Frequently through the day | 279 (23.2) | ||
Almost the whole day | 87 (7.2) | ||
Breast feeding | |||
Yes | 1.152 (95.8) | ||
No | 50 (4.2) | ||
Cat or dog in home in the first year of life | |||
Yes | 333 (27.7) | ||
No | 869 (72.3) | ||
Cat or dog in home in the past 12 months | |||
Yes | 335 (27.9) | ||
No | 967 (72.1) | ||
Contact with farm animals in the first year of life | |||
Yes | 77 (6.4) | ||
No | 1125 (93.6) | ||
Mother regular contact with farm animals | |||
Yes | 110 (9.2) | ||
No | 1092 (90.9) | ||
Living in urban communes | |||
Yes | 768 (63.9) | ||
No | 434 (36.1) | ||
Mother smoke | |||
Yes | 6 (0.5) | ||
No | 1196 (99.5) | ||
Mother smoke during child’s first year of life | |||
Yes | 7 (0.6) | ||
No | 1195 (99.4) | ||
Father smoke | |||
Yes | 629 (52.3) | ||
No | 573 (47.7) | ||
Father smoke during mother’s pregnancy | |||
Yes | 684 (56.9) | ||
No | 518 (43.1) | ||
Smoker(s) in household | |||
Yes | 685 (57.0) | ||
No | 517 (43.0) | ||
