# Table 3 Comparison of seven studies that reported VTE incidence by age group

Present study Næss et al.[2] Braekkan et al.[3] Oger[6] Silverstein et al.[7] Spencer et al.[8, 16]
Patients with first-time DVT and/or PE included 267 740 327 464 444 1567
Period of data collection 2006 1995-2001 1994-2007 1998-1999 1986-1990 1999, 2001, 2003
Geographic location Sweden Norway Norway France United States United States
Age at DVT and/or PE diagnosis, yearsa 70 ± 15 73 (22-102) N/A N/A N/A 64.6
Age groups included ≥18 years ≥20 years >24 years All ages All ages All ages
Yearly incidence of first-time DVT and/or PEb 130 143 140 136 96c 114f
Incidence of first-time DVT and/or PE by age groupb (age range, years) 54 (18-64) 63 (20-64) 54 (<50) 39 (<60) 55 (15-64)d 58 (<65)
270 (65-74) 252 (65-74) 254 (50-69) 354 (60-74) 356 (65-74)d 336 (65-74)
463 (75-84) 529 (75-84) 570 (≥70) 895 (≥75) 628 (75-84)d 538 (75-84)
668 (≥85) 680 (≥85)    818 (≥85)d 781 (≥85)
Yearly incidence of first-time DVT and/or PE in menb 119 128 151 114 107e 103
Yearly incidence of first-time DVT and/or PE in womenb 142 158 131 149 88e 124
Yearly incidence of first-time DVT b 64 93 91 87 49c 95g
Yearly incidence of first-time PEb 66 50 50 46 47c 34h
1. VTE = venous thromboembolism, DVT = deep vein thrombosis, PE = pulmonary embolism, N/A = data not available.
2. a = Mean age with standard deviation or median age with age range, according to each study.
3. b = Incidence per 100,000 person years.
4. c = Incidence age- and sex adjusted.
5. d = Incidence for each age group calculated as follows: The total number of female residents in the age group was calculated as: x = number of cases in females/the incidence in females. The total number of male residents in the age group was calculated as: y = number of cases in males/the incidence in males. Then, the incidence = the total number of cases in the age group/(x + y).
6. e = Incidence age adjusted.
7. f = Age-adjusted VTE incidence rate, all events included.
8. g = Age-adjusted DVT incidence rate with or without concurrent PE.
9. h = Age-adjusted PE incidence rate with or without concurrent DVT.