Table 4.
Odds ratios for use of health care in Brussels and Wallonia compared to Flanders, after adjustment for differences in age and gender, by source and assessment method, BHIS 2008
| Register-based use in BCHI sample a (N = 224,903) | Register-based use in BHIS-linked b (N = 8,869) | Self-reported use in BHIS-total c (N = 9,651) | ||||||
|---|---|---|---|---|---|---|---|---|
| Contact with … | OR | (95 % CI) | OR | (95 % CI) | P-value interaction d | OR | (95 % CI) | P-value interaction e |
| GP < 12 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 0.41* | (0.39–0.42) | 0.45* | (0.37–0.54) | 0.21 | 0.59* | (0.50–0.70) | < 0.001 |
| Wallonia | 0.77* | (0.75–0.79) | 0.79* | (0.65–0.95) | 0.84 | 0.85 | (0.72–1.01) | 0.28 |
| Specialist < 12 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 1.08* | (1.05–1.12) | 1.33* | (1.15–1.53) | 0.01 | 1.51* | (1.33–1.72) | < 0.001 |
| Wallonia | 1.19* | (1.17–1.22) | 1.36* | (1.18–1.57) | 0.10 | 1.26* | (1.11–1.43) | 0.46 |
| Dentist < 12 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 0.77* | (0.74–0.79) | 0.78* | (0.67–0.89) | 0.81 | 0.88 | (0.76–1.02) | 0.02 |
| Wallonia | 0.72* | (0.70–0.73) | 0.70* | (0.61–0.81) | 0.79 | 0.74* | (0.64–0.86) | 0.47 |
| Dentist < 6 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 0.85* | (0.83–0.88) | 0.83* | (0.71–0.96) | 0.65 | 0.91 | (0.78–1.05) | 0.42 |
| Wallonia | 0.77* | (0.76–0.79) | 0.74* | (0.64–0.86) | 0.56 | 0.73* | (0.63–0.85) | 0.52 |
| Physio < 12 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 0.90* | (0.86–0.94) | 0.90 | (0.76–1.07) | 0.72 | 1.08 | (0.92–1.27) | 0.02 |
| Wallonia | 0.97* | (0.94–0.99) | 0.86 | (0.73–1.02) | 0.16 | 0.92 | (0.78–1.08) | 0.53 |
| Inpatient hospital < 12 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 0.92* | (0.88–0.97) | 0.98 | (0.80–1.20) | 0.56 | 0.92 | (0.76–1.11) | 0.94 |
| Wallonia | 1.06 | (1.03–1.09) | 0.89 | (0.73–1.08) | 0.08 | 0.84 | (0.70–1.01) | 0.01 |
| Day patient hospital < 12 m | ||||||||
| Flanders | 1.00 | 1.00 | 1.00 | |||||
| Brussels | 0.94* | (0.90–0.98) | 1.02 | (0.86–1.22) | 0.45 | 0.93 | (0.74–1.16) | 0.74 |
| Wallonia | 0.89* | (0.86–0.91) | 0.89 | (0.75–1.06) | 0.95 | 0.79* | (0.63–0.99) | 0.29 |
< 12 m: the exact definition differs slightly by source; for the BCHI sample: during the 12 months of 2008; for the BHIS sample: during the 12 months prior to the date of the interview
< 6 m: the exact definition differs slightly by source: for the BCHI sample: during a random period of 6 months in 2008; for the BHIS sample: during the 6 months prior to the date of the interview
* significant difference (p < 0.05)
a BCHI : Belgian compulsory health insurance
b BHIS-linked: Belgian Health Interview Survey Sample for which linkage was possible
c BHIS-total: Total Belgian Health Interview Survey Sample
d Interaction assessing if regional differences in register-based use are significantly different by source
e Interaction assessing if regional differences in self-reported use of health care in BHIS are significantly different from those in register-based use of health care in BCHI sample