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Table 3 Sample limited identity line list. (Synthetic data for purposes of illustration).

From: Distributed data processing for public health surveillance

Index Syndrome Visit date Visit comment Age Group Gender City Zip code Event type Temp ICD9 codes Tests ordered
18 Botulism-like 2/17/2006 New!! 35 to 39 M Winchester 01890 Visit 0 Visual Disturbances;spec None
20 Botulism-like 2/17/2006 Last Visit 02/14/2006 5 to 12 F Medford 02155 Visit 0 Diplopia None
51 Fever 2/17/2006 Last Visit 01/31/2006 1 to 4 F North Reading 01864 Visit 98.9 Viral Infections Unspecified; Unspecified Viral Infection Other cultures
52 Fever 2/17/2006 New!! 60 to 64 M Arlington 02476 Visit 97.4 Viral Infections Unspecified; Unspecified Viral Infection None
107 GI:lower 2/17/2006 New!! 1 to 4 M Ayer 01432 Tel. call 0 Abdominal Pain, unspecif.; Shortness of Breath None
108 GI:lower 2/17/2006 New!! 13 to 19 F Burlington 01803 Visit 98.2 Gastroenteritis/colitis N None
378 Neurological 2/17/2006 Last Visit 02/10/2006 40 to 44 M Wilmington 01887 Tel. call 0 Convulsions, Other None
379 Neurological 2/17/2006 New!! 55 to 59 M Lowell 01854 Visit 0 Headache None
411 Rash 2/17/2006 New!! 50 to 54 M Weymouth 02188 Tel. call 0 Herpes Simplex Nos None
434 Respiratory 2/17/2006 New!! 13 to 19 F Hyde Park 02136 Visit 98.1 Bronchitis Acute;Cough None
435 Respiratory 2/17/2006 Last Visit 01/30/2006 40 to 44 F Belmont 02478 Visit 0 Mononucleosis, Infectious None
436 Respiratory 2/17/2006 New!! 80+ M Middleton 01949 Tel. call 0 Strep Sore Throat None
  1. Note: These can be shared with a health department to determine whether it is worthwhile to follow up individual cases, in which case full identifiers can also be provided. Temp = patient temperature if recorded