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Table 2 Characteristics of the study sample ( n= 816) and results of univariate analysis for the AD prescription ratio as a continuous variable and as a dichotomous variable (<0.42 for “low” prescribers and ≥0.42 for “high” prescribers)

From: How do GP practices and patient characteristics influence the prescription of antidepressants? A cross-sectional study

   Number Percent Mean AD prescription ratio [standard deviation] b Odds ratio (95% confidence interval) c
Characteristics of the GPs
 Gender Female 234 28.7 0.47 [0.22] 1
Male 582 71.3 0.44 [0.26] 0.98 (0,84;1.15)
 Age category <40 years 72 8.8 0.39 [0.15] 1
40 to 49 years 198 24.3 0.47 [0.21] 1.58 (1.26;1.96)
50 to 59 years 345 42.3 0.47 [0.24] 1.53 (1.26;1.86)
≥60 years 201 24.6 0.43 [0.31] 1.21 (0.99;1.47)
 Practice location Rural 190 23.3 0.41 [0.16] 1
Urban 626 76.7 0.46 [0.27] 1.20 (1.05;1.4)
 GP partially particular mode of practice Yes 53 6.5 0.39 [0.67] 0.63 (0.53; 0.7)
No 763 93.5 0.45 [0.19] 1
 Cessation of activity during the year 2010 Yes 14 1.7 0.46 [0.21] 0.84 (0.45;1.54)
No 802 98.3 0.45 [0.25] 1
 Cumulative years of medical practice <10 155 19 0.42 [0.19] 1
10–19 213 26.1 0.45 [0.20] 1.06 (0.87;1.30)
20–29 267 32.7 0.47 [0.23] 1.18 (0.97;1.44)
>30 181 22.2 0.46 [0.35] 1.04 (0.85;1.27)
Characteristics of the GP’s practice and patients in 2010
 Number of consultations and home visits <1,999 113 13.8 0.51 [0.50] 1
2,000 to 3,999 320 39.2 0.45 [0.22] 1.00 (0.80;1.24)
4,000 to 5,999 296 36.3 0.44 [0.14] 1.03 (0.82;1.28)
≥6,000 87 10.7 0.40 [0.15] 0.81 (0.63;1.05)
 Number of different patients per year <999 369 45.2 0.47 [0.31] 1
>1,000 447 54.8 0.43 [0.18] 0.90 (0.79;1.04)
 Number of registered patients <499 213 26.1 0.46 [0.42] 1
500–1,000 435 53.3 0.45 [0.15] 1.21 (1.04;1.41)
>1,000 168 20.6 0.45 [0.15] 1.28 (1.05;1.57)
 Mean age of patients <40 83 10.2 0.46 [0.37] 1
40–49 574 70.3 0.46 [0.20] 1.11 (0.89;1.38)
≥50 159 19.5 0.43 [0.34] 0.92 (0.72;1.18)
 Number of patients with low income* <39 478 58.6 0.46 [0.30] 1
40–79 176 21.6 0.45 [0.16] 0.95 (0.80;1.14)
≥80 162 19.9 0.41 [0.14] 0.77 (0.66;0.90)
 Number of patients with chronic diseasea <100 244 29.9 0.48 [0.40] 1
100–199 361 44.2 0.45 [0.14] 1.06 (0.86;1.25)
200–299 175 21.4 0.43 [0.14] 0.93 (0.77;1.12)
≥300 36 4.4 0.40 [0.10] 0.90 (0.66;1.24)
 Number of days of sickness certificates prescribed <1,999 223 27.3 0.46 [0.42] 1
2,000–3,999 281 34.4 0.46 [0.14] 1.34 (1.12;1.60)
4,000–5,999 191 23.4 0.44 [0.15] 1.12 (0.93;1.38)
≥6,000 121 14.8 0.42 [0.14] 1.00 (0.82;1.22)
 Number of patients prescribed a sickness certificate <100 454 55.6 0.46 [0.31] 1
≥100 362 44.4 0.44 [0.14] 0.97 (0.84;1.11)
 Prescription of new ADs ≥70% new AD 741 90.8 0.46 [0.25] 1.60 (1.38;1.86)
<70% new ADs 75 9.2 0.33 [0.17] 1
 Total volume of reimbursement (number of units) 0–19,999 261 32 0.49 [0.39] 1
20,000–39,999 397 48.7 0.44 [0.14] 0.96 (0.82;1.13)
≥40,000 158 19.4 0.41 [0.15] 0.87 (0.75;1.01)
 Number of prescriptions orders 0 to 1,999 152 18.6 0.49 [0.49] 1
2,000 to 3,999 298 36.5 0.45 [0.16] 1.11 (0.92;1.35)
4,000 to 5,999 270 29.9 0.44 [0.14] 1.08 (0.89;1.31)
≥6,000 96 9.7 0.42 [0.13] 0.98 (0.77;1.24)
  1. *Patients with low income, treated free of charge, with no direct payment to the GP.
  2. aChronic diseases, at least one of 30 chronic conditions such as type 2 diabetes, or chronic heart failure.
  3. bAD prescription ratio as a continuous variable.
  4. cRelative to the dichotomized AD prescription ratio using the lower prescription level as the reference level.