From: Assessment of selection bias in a health survey of children and families – the IDEFICS Sweden-study
Child anthropometric measurements | IDEFICS population | Reference population | p-value |
---|---|---|---|
(n=1 825) | (n=1 825) | ||
BMI SDS index at age of inclusiona | 0.110 (1.000) | 0.169 (0.976) | 0.160 |
0.085 (−3.548; 4.010) | 0.126 (−3.432; 3.671) | ||
n = 1 644 | n = 1 479 | ||
BMI SDS at 2.5 yearsb | 0.135 (0.997) | 0.163 (0.984) | 0.469 |
n = 1 389 | n = 1 265 | ||
BMI SDS at 4 yearsb | 0.063 (0.987) | 0.067 (0.986) | 0.978 |
n = 1 622 | n = 1 471 | ||
BMI SDS at 5.5 yearsb | 0.080 (1.016) | 0.075 (1.009) | 0.521 |
n = 1 450 | n = 1 333 | ||
BMI SDS at 8 yearsb | 0.191 (1.025) | 0.303 (1.040) | 0.049 |
n = 1 060 | n = 1 002 | ||
BMI categories at 2.5 years | |||
Normal weight and underweight | 1 227 (88.4%) | 1 096 (86.6%) | |
Overweight | 136 (9.8%) | 147 (11.6%) | |
Obese | 25 (1.8%) | 22 (1.7%) | 0.281 |
BMI categories at 4 years | |||
Normal weight and underweight | 1 443 (89.0%) | 1 302 (88.6%) | |
Overweight | 153 (9.4%) | 138 (9.4%) | |
Obese | 26 (1.6%) | 30 (2.0%) | 0.577 |
BMI categories at 5.5 years | |||
Normal weight and underweight | 1 272 (87.7%) | 1 150 (86.3%) | |
Overweight | 142 (9.8%) | 144 (10.8%) | |
Obese | 36 (2.5%) | 39 (2.9%) | 0.253 |
BMI categories at 8 years | |||
Normal weight and underweight | 883 (83.2%) | 802 (80.0%) | |
Overweight | 147 (13.9%) | 155 (15.5%) | |
Obese | 31 (2.9%) | 45 (4.5%) | 0.033 |