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. 2023 Jan 20;23:143. doi: 10.1186/s12889-022-14439-4

Table 2.

Counts and percentages showing breakdown of demographic variables across groups and chi-square tests of independence

Control
n = 10698
Intervention
n = 11088
χ2 (df) p
Sex [n (%)] Male 5446 (50.9%) 5687 (51.3%) 0.304 (1) 0.58
Female 5252 (49.1%) 5401 (48.7%)
Age [n (%)] 2-year-old 4599 (43.0%) 4809 (43.4%) 0.308 (1) 0.579
3-year-old 6099 (57.0%) 6279 (56.60%)
Previous Vaccine [n (%)]

Previously had vaccine

No previous vaccine

261 (2.44%)

10437 (97.56%)

257 (2.32%)

10831 (97.68%)

0.298 (1) 0.58