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Table 2 Demographics of the primary care data collection projects

From: Factors influencing the development of primary care data collection projects from electronic health records: a systematic review of the literature

Country Project name Number of patients (% population)a Number of GPs (other healthcare measurement) Sources
UK CPRD 13 million (20%) 600 GPs [15]
THIN 11.1 million (17%) 562 GPs [16]
Qresearch 18 million (28%) 1000 GPs [42]
USA Veterans database 17 million (5%) GPs unknown (53,000 healthcare professionals) [154]
Geisinger© Health System project 400,000 (0.1%) GPs unknown (41 community practice clinics)  
General Electric Centricity© 8.9 million (2.8%) 7259 GPs [163, 164]
OCHIN, Inc 1 million patients annually (0.3%) GPs unknown (200 clinic sites) [22]
Baylor Health Care System (BHCS) and Christiana Care Health System (CCHS) 680,000 patients (0.2%) GPs unknown (33 primary care practices + 35 office practices) [166]
University of California Davis Health System’s electronic medical record system unknown GPs unknown (13 clinics in this analysis) [168]
CHCI – Connecticut 130,000 (0.04%) GPs unknown (13 primary health centers) [170]
MGPO 87,568 patients in this study (0.02%) 148 GPs in this study [19]
OpenDoor 40,000 patients annually (0.01%) GPs unknown (4-site federally qualified community health center in New York) [173]
New York City Primary Care Information Project unknown GPs unknown (82 practices) [21]
IFH 90,000 patients (0.02%) GPs unknown (17 community health centers) [20]
Department of Family Medicine – Wisconsin 110,000 for these studies (0.03%) GPs unknown (28 primary care clinics) [178, 179]
Canada CPCSSN 1.28 million (3.6%) 1031 GPs [24, 56]
EMRALD 0.5 million (1.4%) 350 GPs [74]
DELPHI 30,000 (0.08%) 30 GPs [24]
Netherlands IPCI 1.5 million (8.8%) 600 GPs [29, 38]
Nivel-PCD
LINH
1.6 million (10%)
350,000 (2%)
GPs unknown (500 practices)
85–150 GPs
[41, 83, 85]
Julius 156,176 (0.9%) 60 GPs [41, 87]
RNH 51,700 (0.3%) 65 GPs (22 practices) [89]
Spain SIDIAP 6 million (12.8%) 274 GPs [90]
ECRPC unknown GPs unknown  
BIFAP 3.2–4.8 million (6.8–10%) 1183 GPs [94, 95]
Australia GRAPHC 32,000 (0.1%) GPs unknown (1 GP practice) [48]
Canning Division of General Practice unknown GPs unknown (8 GP sites) [50]
MEGPN 505,600 (2.1%) 578 GPs (141 practices) [17]
Belgium Intego 285,000 (2.5%) GPs unknown (95 GP practices) [52]
NIHDI 29,000 (0.25%) GPs unknown (5000 practices) [23]
France LPD – Cegedim 1.5 million (2%) 1200 GPs (+ 750 various medical specialists) [8]
Italy Health Search Database / CSD© 2.5 million (4.1%) 900 GPs [77]
Sweden Swedestar project unknown GPs unknown [96]
Switzerland FIRE 113,335–293,000 (14–36%) 60–120 GPs [97, 98]
  1. aPercentage denominator (i.e., the country population was extracted from national official websites)