Weight status and abdominal obesity at age 4 according to type of healthcare use: primary care visits, drug prescriptions and hospital admissions, during the 2-year follow-up
| Primary care visits | Drug prescriptions | Hospital admissions | ||||
| IRR* | 95% CI | IRR* | 95% CI | IRR* | 95% CI | |
| Weight status at age 4 according to z-BMI† (n=1857) | ||||||
| No excess weight | 1(ref) | 1(ref) | 1(ref) | |||
| Overweight | 0.98 | 0.91 to 1.06 | 1.02 | 0.82 to 1.28 | 1.24 | 0.87 to 1.77 |
| Obesity | 1.08 | 0.94 to 1.23 | 1.62 | 1.11 to 2.38 | 0.80 | 0.41 to 1.57 |
| Weight status at age 4 according to waist circumference‡ (n=1851) | ||||||
| No abdominal obesity | 1(ref) | 1(ref) | 1(ref) | |||
| Abdominal obesity | 1.06 | 0.95 to 1.19 | 1.37 | 0.99 to 1.90 | 0.94 | 0.53 to 1.64 |
| Weight status at age 4 (baseline) according to waist-to-height ratio§ (n=1851) | ||||||
| No abdominal obesity | 1(ref) | 1(ref) | 1(ref) | |||
| Abdominal obesity | 1.06 | 0.97 to 1.17 | 1.34 | 1.02 to 1.76 | 0.88 | 0.54 to 1.44 |
*IRR: Incidence Rate Ratio estimated using mix models of negative binomial regression adjusted for sex, age, maternal educational level, familial purchasing power, time breastfeeding and perceived health status at age 4.
†Overweight: +1 SD of the BMI (z-scores) (z-BMI); Obesity: +2 SD of z-BMI, based on the WHO-2006 reference tables.
‡Abdominal obesity: ≥90 percentile according to reference tables by Fernández et al.15
§Abdominal obesity: ≥90 percentile del waist-to-height ratio (both in cm).
BMI, body mass index.