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Table 1 Distribution of prescriber characteristics within the entire general practice cohort. The mean and standard deviation (SD) of the variable “long-term user proportion”* is reported for each prescriber characteristic

From: General practice variation when initiating long-term prescribing of proton pump inhibitors: a nationwide cohort study

  N all practices Mean (SD) N single-handed Mean (SD) N partnership Mean (SD)
Practice organisation
 Single-handed 1041 0.37 (0.15) 1041 0.37 (0.15) 0 -
 Partnership 878 0.33 (0.09) 0 - 878 0.33 (0.09)
Training practice
 No 1286 0.36 (0.14) 823 0.37 (0.16) 463 0.33 (0.10)
 Yes 633 0.35 (0.11) 218 0.36 (0.14) 415 0.34 (0.09)
Number of GPs
 1 1041 0.37 (0.15) 1041 0.37 (0.15) 0 -
 2 414 0.33 (0.11) 0 - 414 0.33 (0.11)
 3 246 0.33 (0.09) 0 - 246 0.33 (0.09)
 4 129 0.33 (0.08) 0 - 129 0.33 (0.08)
 5 56 0.33 (0.08) 0 - 56 0.33 (0.08)
 >5 33 0.33 (0.06) 0 - 33 0.33 (0.06)
GP age group
 Under 45 years 121 0.32 (0.11) 48 0.33 (0.14) 73 0.31 (0.09)
 45-49 years 261 0.32 (0.09) 68 0.33 (0.11) 193 0.31 (0.08)
 50-54 years 455 0.33 (0.11) 150 0.33 (0.14) 305 0.32 (0.09)
 55-59 years 497 0.36 (0.13) 285 0.36 (0.15) 212 0.34 (0.09)
 60-64 years 385 0.39 (0.16) 313 0.39 (0.16) 72 0.38 (0.11)
 65 years or above 200 0.40 (0.15) 177 0.40 (0.15) 23 0.40 (0.13)
GP gender
 Male 875 0.38 (0.15) 735 0.38 (0.15) 140 0.38 (0.11)
 Predominantly male 193 0.34 (0.08) 0 - 193 0.34 (0.08)
 Equally mixed 302 0.32 (0.09) 0 - 302 0.32 (0.09)
 Predominantly female 153 0.32 (0.08) 0 - 153 0.32 (0.08)
 Female 396 0.33 (0.14) 306 0.34 (0.15) 90 0.30 (0.09)
Practice location
 Capital area 602 0.34 (0.14) 412 0.36 (0.15) 190 0.32 (0.11)
 Provincial city 760 0.35 (0.13) 388 0.37 (0.16) 372 0.32 (0.09)
 Rural area 557 0.37 (0.12) 241 0.39 (0.15) 316 0.35 (0.09)
Patients per GP
 <1350 575 0.35 (0.13) 192 0.38 (0.16) 383 0.33 (0.10)
 1350-1575 453 0.36 (0.14) 249 0.38 (0.17) 204 0.34 (0.09)
 1576-1750 414 0.35 (0.13) 247 0.37 (0.16) 167 0.33 (0.08)
 >1750 477 0.35 (0.13) 353 0.36 (0.13) 124 0.32 (0.10)
  1. *The “long-term user proportion” is defined as the proportion of adult first time users of PPI within the practice who redeemed more than 60 DDDs of PPI within six months in 2011
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