Table 3. Pooled relative differences, total difference in vaccine uptake in neighbourhoods, by level of urbanisation, the Netherlands, September–December 2021.

Characteristics	Relative difference	95% CI
Not urbanised	0.33	0.28–0.37
Hardly urbanised	0.30	0.24–0.36
Moderately urbanised	0.35	0.28–0.42
Strongly urbanised	0.31	0.26–0.36
Extremely urbanised	0.22	0.18–0.26

CI: confidence interval.

Not urbanised (< 500 addresses/km²); hardly urbanised (500–999 addresses/km²); moderately urbanised (1,000–1,499 addresses/km²); strongly urbanised (1,500–2,499 addresses/km²); extremely urbanised (≥ 2,500 addresses/km²).