Table 3

 Distribution of admissions for cases and control diagnoses by traffic categories

Respiratory grouping* (number of persons)Control diagnoses
All diagnoses†(number of persons)Gastrointestinal‡(number of persons)Genitourinary§(number of persons)
*Respiratory grouping includes ICD-9 codes 460-519. †Control diagnoses includes ICD-9 001-009, 020-139, 240-389, 520-629, 680-739; trauma, tumours, tuberculosis, and circulatory system diseases were excluded. ‡Includes ICD-9 codes 520-579. §Includes ICD-9 codes 580-629. ¶Traffic intensities correspond to the estimates of peak morning three hour traffic volumes from the MOTREM98 EMME/2 model.
Off traffic network (low traffic)4081 (3286)28844 (22600)5448 (4563)3235 (2648)
Medium traffic¶ (5–3160 vehicles/3 hour morning peak)1241 (960)7881 (6102)1438 (1187)820 (661)
High traffic (>3160 vehicles/3 hour morning peak)483 (381)2535 (1980)448 (379)207 (164)