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. 2016 Aug 24;11(8):e0160540. doi: 10.1371/journal.pone.0160540

Table 3. Beliefs of patients and the general public about the effects of physician-pharmaceutical industry interaction on prescribing behavior, quality of care, and cost of care.

Beliefs about the effects of interaction on prescribing behavior
Type of interaction Influences prescribing behavior Has little or no influence on prescribing behavior Not sure/Don’t know No opinion/ Neutral
Country, year1 % (N)2 % (N) % (N) % (N) Reference
Gifts in General USA, 1995 70% (N = 486) 24.5% (N = 486) - - [52]
USA, 2009 41.2% (N = 903) 16.9% (N = 903) 32.8% (N = 903) 9.1% (N = 903) [59]
USA, 2008 49% (N = 192) - - - [63]
Australia, 2007 59% (N = 134) - - - [58]
Turkey, 2004 29% (N = 584) 37% (N = 584) 33% (N = 584) - [57]
Australia, 2007 - 49% (N = 906) - 24% (N = 906) [60]
Trip/Travel Turkey, 2004 69.9% (N = 584) 6.8% (N = 584) 23.3% (N = 584) - [57]
USA, 1998 56% (N = 196) - - - [55]
Dinner Turkey, 2004 62.8% (N = 584) 14.3% (N = 584) 22.9% (N = 584) - [57]
USA, 1998 48% (N = 196) - - - [55]
Drug sample and medical books Turkey, 2004 46.1% (N = 584) 33.2% (N = 584) 20.7% (N = 584) - [57]
USA, 1998 42% (N = 196) - - - [55]
Pen USA, 1998 31% (N = 196) - - - [55]
Turkey, 2004 32.6% (N = 584) 52.6% (N = 584) 14.8% (N = 584) - [57]
Obtaining an electrocardiogram or medical devices for the office Turkey, 2004 71–74% (N = 584) 5.1–9.8% (N = 584) 19.3–20.8% (N = 584) - [57]
Invitation to conferences for the weekend at hotels /invitation for the congresses Turkey, 2004 59.2–63.5% (N = 584) 8.9–19.5% (N = 584) 27.6–29.8% (N = 584) - [57]
Cover for the car seats Turkey, 2004 61.7% (N = 584) 19.7% (N = 584) 18.6% (N = 584) - [57]
Pocketknife USA, 1998 28% (N = 196) - - - [55]
Beliefs about the effect of interaction on quality of care
Influences decision/care May influence decision/care Has little or no influence Not sure/No opinion
Country, year % (N) % (N) % (N) % (N) Reference
Gifts in General Australia, 2007 27% (N = 906) - 49% (N = 906 24% (N = 906) [60]
South Africa, 2011 80% (N = 200) 14% (N = 200) 7% (N = 200) - [64]
Positive effect No effect Negative effect Don’t know
Office use gifts USA, 1995 14% (N = 649) 61% (N = 649) 13% (N = 649) 12% (N = 649) [54]
Personal gifts USA, 1995 8% (N = 649) 54% (N = 649) 23% (N = 649) 15% (N = 649) [54]
Beliefs about the effect of interaction on cost of care
Increases cost No effect Decreases cost Don’t know
Country, year % (N) % (N) % (N) % (N) Reference
Gifts in General USA, 1995 64% (N = 486) 23% (N = 486) 3.1% (N = 486) - [52]
USA, 2009 67.3% (N = 903) 31.6% (N = 903) 1.2% (N = 903) - [59]
USA, 1998 33% (N = 196) 39% (N = 196) - - [55]
Turkey, 2004 54.5% (N = 584) - - 35.2% (N = 584) [57]
Office-use gift USA, 1995 26% (N = 649) 38% (N = 649) 19% (N = 649) 16% (N = 649) [54]
Personal gift USA, 1995 42% (N = 649) 30% (N = 649) 14% (N = 649) 14% (N = 649) [54]

1 This indicates year of the study for each finding (and if not reported, the year of publication)

2 N refers to the sample size