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. Author manuscript; available in PMC: 2009 Feb 3.
Published in final edited form as: Int J Epidemiol. 2008 Mar 7;38(1):38–47. doi: 10.1093/ije/dyn040

Table 3.

Characteristics of survey respondents and non-respondents

Respondents n (%) or Mean ± (SD)
Non-respondents
African
American
Asian
(Chinese, Korean, Vietnamese, Japanese)
Caucasian Filipino Latino Multiracial Othera
/unknown
All
respondents
Non respondents Number (%) or Mean ± (SD)
n (row %) 3420 (16.9) 2312 (11.4) 4602 (22.8) 2404 (11.9) 3717 (18.4) 2222 (11.0) 1511 (7.5) 20 188 (100) 20 547 (100)
Survey Mode
 Telephone Interview 1806 (52.8) 971 (42.0) 2051 (44.6) 846 (35.2) 2229 (60.0) 1566 (70.5) 960 (63.5) 10429 (51.7) 0
 Written-long 771 (22.5) 575 (24.9) 973 (21.1) 723 (30.1) 676 (18.2) 346 (15.6) 224 (14.8) 4288 (21.2) 0
 Written-short 439 (12.8) 259 (11.2) 469 (10.2) 516 (21.5) 448 (12.0) 108 (4.9) 154 (10.2) 2393 (11.8) 0
 Web 404 (11.8) 507 (21.9) 1109 (24.1) 319 (13.3) 364 (9.8) 202 (9.1) 173 (11.4) 3078 (15.2) 0
Female 1939 (56.7) 1019 (44.1) 2035 (44.2) 1246 (51.8) 1886 (50.7) 1122 (50.5) 593 (39.3) 9840 (48.7) 9537 (46.4)
Age (years)
 30–44 274 (8.0) 137 (5.9) 382 (8.3) 168 (7.0) 564 (15.2) 253 (11.4) 189 (12.5) 1967 (9.7) 2580 (12.6)
 45–59 1347 (39.4) 934 (40.4) 1794 (39.0) 1106 (46.0) 1639 (44.1) 943 (42.4) 695 (46.0) 8458 (41.9) 8755 (42.6)
 60+ 1799 (52.6) 1241 (53.7) 2426 (52.7) 1130 (47.0) 1514 (40.7) 1026 (46.2) 627 (41.5) 9763 (48.4) 9212 (44.8)
Language preference English speaking 3221 (94.2) 1376 (59.5) 4394 (95.5) 1749 (72.8) 2217 (59.6) 1691 (76.1) 1164 (77.0) 15 812 (78.3) 17 212 (83.8)
Mean A1C ⩾ 7% 1655 (54.0) 1087 (50.1) 1915 (46.8) 1352 (60.4) 1957 (58.6) 1098 (56.2) 779 (57.9) 9843 (54.1) 8343 (51.3)
Mean LDL ⩾ 100 1250 (41.7) 626 (28.9) 1391 (34.6) 634 (28.6) 1202 (37.1) 736 (38.1) 482 (36.3) 6321 (35.3) 6909 (42.4)
Uncontrolled blood pressure (S>130 or D>80) 1966 (61.4) 913 (42.8) 2264 (54.7) 1041 (46.5) 1746 (51.2) 1089 (54.2) 681 (49.5) 9700 (52.4) 9581 (54.3)
Missed appointment rate (per year) 0.17 ± (0.18) 0.10 ± (0.14) 0.13 ± (0.16) 0.13 ± (0.17) 0.18 ± (0.19) 0.17 ± (0.19) 0.18 ± (0.19) 0.15 ± (0.17) 0.18 ± (0.22)
Poor medication adherenceb 955 (37.1) 461 (25.1) 961 (28.2) 592 (29.3) 1247 (42.8) 636 (36.4) 424 (35.1) 5276 (33.6) 5108 (39.0)
Smoking (current) 348 (10.2) 93 (4.0) 410 (9.0) 147 (6.1) 245 (6.6) 200 (9.1) 105 (7.0) 1548 (7.7) 1829 (9.0)
Practices SMBG 1573 (46.0) 1004 (43.4) 2246 (48.8) 1115 (46.4) 1622 (43.6) 1025 (46.1) 623 (41.2) 9208 (45.6) 6532 (31.8)
Outpatient risk scorec 2.4 (2.1) 1.8 (1.1) 2.1 (1.7) 1.8 (1.0) 1.9 (1.4) 2.2 (1.6) 1.9 (1.4) 2.0 (1.6) 1.8 (1.5)
Inpatient risk scorec 2.6 (4.2) 1.5 (2.0) 2.2 (3.3) 1.4 (2.1) 1.8 (3.0) 2.2 (3.9) 1.7 (2.9) 2.0 (3.2) 1.8 (3.4)
Linguistically isolated neighbourhoodd 105 (3.1) 115 (5.0) 55 (1.2) 114 (4.8) 281 (7.6) 113 (5.1) 62 (4.1) 845 (4.2) 1035 (5.1)
Economically deprived neighbourhoode 827 (24.3) 124 (5.4) 346 (7.6) 148 (6.2) 668 (18.2) 323 (14.7) 167 (11.2) 2603 (13.0) 2724 (13.4)
Working class neighbourhoodf 1440 (42.2) 401 (17.4) 1168 (25.8) 884 (37.0) 1749 (47.6) 868 (39.4) 464 (31.0) 6974 (34.9) 7566 (37.2)
a

Includes Pacific Islanders, Native Americans, South Asian, other unspecified and unknown (did not answer).

b

⩾20% continuous medication gaps.63

c

They are weighted by patient’s health care utilization and severity of disease.64

d

⩾25% of households in census block group are linguistically isolated.

e

⩾20% of households in census block group are living below poverty line.

f

⩾66% of persons in census block group are employed in working class occupation.