Category | Number of prescriptions | Number of patients | IRR | 95% CI | p-value |
---|---|---|---|---|---|
Year of visit | |||||
2009 | 1791 | 4394 | 1 (ref) | ||
2010 | 1837 | 4353 | 1.04 | 0.93–1.15 | 0.490 |
2011 | 1987 | 4230 | 1.15 | 1.04–1.27 | 0.009* |
2012 | 2037 | 4133 | 1.21 | 1.09–1.34 | < 0.001* |
2013 | 2182 | 3977 | 1.35 | 1.21–1.49 | < 0.001* |
2014 | 2100 | 3816 | 1.35 | 1.21–1.50 | < 0.001* |
aGender | |||||
Male | 3850 | 3328 | 1(ref) | ||
Female | 8078 | 5774 | 1.15 | 1.08–1.22 | < 0.001* |
Age group | |||||
16–17 years | 1074 | 2455 | 1 (ref) | ||
18–20 years | 3442 | 4093 | 1.58 | 1.43–1.75 | < 0.001* |
21–24 years | 7418 | 6617 | 1.93 | 1.75–2.11 | < 0.001* |