Table 3 Frequency of matching criteria
From: Effectiveness of Montelukast on asthma control in infants: methodology of a French claims data study
Matching criteria | MTL-4 group (n = 51) | ICS only group (n = 768) | MTL-4 + ICS groups (n = 819) |
|---|---|---|---|
Age (mean, months) | 15.7 | 13.8 | 13.9 |
Female: n (%) | 14 (27.5%) | 286 (37.2%) | 300 (36.6%) |
Quarter of index date: | |||
Q1 2010-2011 | 9 (17.6%) | 245 (31.9%) | 254 (31.0%) |
Q2 2010-2011 | 20 (39.2%) | 221 (28.8%) | 241 (29.4%) |
Q3 2010-2011 | 10 (19.7%) | 106 (13.8%) | 116 (14.2%) |
Q4 2010-2011 | 12 (23.5%) | 196 (25.5%) | 208 (25.4%) |