Table 2

Characteristics of the population at baseline (most recent values, up to 3 years prior to index date) by prevalent and incident cohort
Prevalent(n=4315) Incident(n=381)
Demographics n (%) n (%) Total N
 Age
20-59 years 777 (18.01%) 98 (25.72%) 875
60-64 415 (9.62%) 28 (7.35%) 443
65-69 512 (11.87%) 39 (10.24%) 551
70-74 607 (14.07%) 60 (15.75%) 667
75-79 735 (17.03%) 57 (14.96%) 792
80-84 630 (14.60%) 59 (15.49%) 689
85 years and over 639 (14.81%) 40 (10.50%) 679
 Gender
male 2061 (47.76%) 223 (58.53%) 2284
female 2254 (52.24%) 158 (41.47%) 2412
 Race
white 4074 (94.41%) 365 (95.80%) 4539
non-white 241 (5.59%) 16 (4.20%) 257
Clinical findings and measurements
 BMI (kg/m2)
<25 1034 (23.96%) 83 (21.78%) 1117
25-34 2331 (54.02%) 219 (57.48%) 2550
>=35 950 (22.02%) 79 (20.73%) 1029
 Smoking Status
current smoker 418 (9.69%) 38 (9.97%) 456
never or former smoker 3897 (90.31%) 343 (90.03%) 4240
 Systolic blood pressure (mm/hg)
<120 1267 (29.36%) 126 (33.07%) 1393
120-140 1637 (37.94%) 149 (39.11%) 1786
>140 1411 (32.70%) 106 (27.82%) 1517
 Hemoglobin
<11gm/dl 466 (10.80%) 42 (11.02%) 508
>= 11gm/dl 3849 (89.20%) 339 (88.98%) 4188
 Renal function* (ml/min/1.73m2)
>=60 2389 (55.37%) 261 (68.50%) 2650
45-60 972 (22.53%) 64 (16.80%) 1036
30-45 671 (15.55%) 35 (9.19%) 706
<30 283 (6.56%) 21 (5.51%) 304
 Ejection fraction on echocardiogram(%)
>65 353 (8.18%) 18 (4.72%) 371
51-65 2331 (54.02%) 169 (44.36%) 2500
41-50 533 (12.35%) 60 (15.75%) 593
31-40 488 (11.31%) 62 (16.27%) 550
21-30 417 (9.66%) 55 (14.44%) 472
1-20 193 (4.47%) 17 (4.46%) 210
 Posterior wall thickness on echocardiogram (mm)
<11 1763 (40.86%) 154 (40.42%) 1917
>=11 2552 (59.14%) 227 (59.58%) 2779
Comorbid diagnoses
 Atrial fibrillation
yes 1603 (37.15%) 123 (32.28%) 1726
no 2712 (62.85%) 258 (67.72%) 2970
 Aortic valvular disease
yes 1354 (31.38%) 141 (37.01%) 1495
no 2961 (68.62%) 240 (62.99%) 3201
 Coronary artery disease
yes 2224 (51.54%) 178 (46.72%) 2402
no 2091 (48.46%) 203 (53.28%) 2294
 Chronic lung disease
yes 2002 (46.40%) 141 (37.01%) 2143
no 2313 (53.60%) 240 (62.99%) 2553
 Depression
yes 961 (22.27%) 81 (21.26%) 1042
no 3354 (77.73%) 300 (78.74%) 3654
 Diabetes
yes 1480 (34.30%) 102 (26.77%) 1582
no 2835 (65.70%) 279 (73.23%) 3114
 Hypothyroidism
yes 726 (16.83%) 47 (12.34%) 773
no 3589 (83.17%) 334 (87.66%) 3923
 Hyperlipidemia
yes 2010 (46.58%) 181 (47.51%) 2191
no 2305 (53.42%) 200 (52.49%) 2505
 Peripheral vascular disease
yes 703 (16.29%) 49 (12.86%) 752
no 3612 (83.71%) 332 (87.14%) 3944
 Stroke
yes 474 (10.98%) 37 (9.71%) 511
no 3841 (89.02%) 344 (90.29%) 4185
 Transient ischemic attack
yes 298 (6.91%) 23 (6.04%) 321
no 4017 (93.09%) 358 (93.96%) 4375

Smith et al.

Smith et al. BMC Health Services Research 2012 12:434   doi:10.1186/1472-6963-12-434

Open Data