Table 2.
Estimates of sample sizes to detect a prescribing difference of 10% (with two-tailed test)
| ATC code | Estimate of ICC | Sample size (NCP) | |
| macrolides | J01FA | 0.024 | 68 |
| fluoroquinolones | J01MA | 0.030 | 68 |
| antidepressants | n06ab | 0.058 | 88 |
| nitroderivatives | C01da02, 05,08,14 | 0.09 | 96 |
| bifosphosphonates (15% diff) | M05ba | 0.062 | 106 |
| proton pump inhibitors | A02BC | 0.087 | 108 |
| phosphomicine | J01xx01 | 0.014 | 108 |
| Alfa blockers (for IPB) | g04ca + g04bx49 | 0.075 | 116 |
| doxazosin (for IPB) | c02ca04 | 0.038 | 128 |
| long acting β2 broncodilators + corticosteroids | R03AK06 e R03AK07 | 0.092 | 148 |
| Finasteride +dutasteride | g04cb | 0.08 | 154 |
| opioids | N02A | 0.061 | 164 |
| clarithromicine | J01fa09 | 0.02 | 172 |
| esomeprazole | A02bc05 | 0.023 | 204 |
| long acting β2 broncodilators | R03AC12 e R03AC13 | 0.033 | 208 |
| alendronate | M05ba04 | 0.08 | 218 |
| finasteride | g04cb01 | 0.1 | 220 |
| salmeterol + corticosteroids | R03ak06 | 0.102 | 234 |
| bifosphosphonates | M05ba | 0.062 | 238 |
| azitromicine | J01fa10 | 0.068 | 266 |
| risedronate | M05ba07 | 0 | 374 |
| norfloxacine | J01ma06 | 0.055 | 386 |
| fentanyl | N02ab03 | 0.043 | 428 |
| salmeterol | R03ac12 | 0.053 | 698 |
| morphine | N02aa01 | 0.05 | 2224 |
| buprenorphine | N02ae01 | 0 | Nc |
| bicalutamide | l02bb03 | 0 | Nc |
| escitalopram | N06ab10 | 0 | 1434 |
| levocetirizine | R06ae09 | 0.032 | >600 |
| antiandrogens | L02bb01+ L02bb03 | 0 | nc |