Table 2
Subgroup analysis
Subgroup
Results, % (95% CI)
Statistics
Year
Prior to 2015
2.1 (1.1 to 4.0)
After 2015
3.3 (2.4 to 4.4)
Q=1.342, p=0.247
Sample size
Less than 200
3.1 (1.9 to 5.1)
More than 200
3.0 (2.2 to 4.1)
Q=141, p=0.707