Table 2.

Univariate associations between mammography uptake and predictor variables (Maximizing Mammography Participation Trial)

Mammography uptake*
TotalPχ2
EarlyLateNever
Age0.00118.43
    50-59427 (28.1)797 (52.5)294 (19.4)1,518
    60-69325 (29.7)566 (51.7)204 (18.6)1,095
    70-80353 (32.4)486 (44.7)249 (22.9)1,088
    Total1,1051,8497473,701
Race0.00119.67
    White1,020 (30.4)1,885 (50.3)646 (19.3)3.351
    Black53 (24.7)106 (49.3)56 (26.1)215
    Other25 (21.6)53 (45.7)38 (32.8)116
    Total1,0981,8447403,682
Education level0.000321.51
    Less than high school52 (22.7)117 (51.1)60 (26.2)229
    Some college665 (29.4)1,112 (49.1)488 (21.6)2.265
    College graduate384 (32.1)617 (51.5)197 (16.4)1,198
    Total1,1011,8467453,692
Income<0.000148.79
    Under US$30,000358 (27.7)600 (46.4)336 (26.0)1,294
    Over US$30,000622 (31.6)1,034 (52.5)315 (16.0)1,971
    Total9801,6346,6513,265
Prior mammography history<0.0001801.44
    No25 (4.7)160 (30.1)346 (65.2)531
    Yes1,080 (34.1)1,689 (53.3)401 (12.7)3,170
    Total1,1051,8497473,701
Study intervention<0.00011,811.43
    None1,105 (57.1)809 (41.8)22 (1.1)1,936
    Reminder postcard0314 (53.2)276 (46.8)590
    Reminder telephone call0726 (61.8)449 (38.2)1,175
    Total1,1051,8497473,701
Perceived ambiguity<0.0001279.34
    Lowest894 (32.0)1,465 (52.4)435 (15.6)2,794
    Low158 (31.0)240 (47.2)111 (21.8)509
    High46 (14.7)120 (38.3)147 (47.0)313
    Highest6 (8.0)20 (26.7)49 (65.3)75
    Total1,1041,8457423,691
Baseline mammography intentions<0.0001697.08
    Very unlikely39 (11.1)82 (23.2)232 (65.7)353
    Somewhat unlikely48 (17.5)112 (40.7)115 (41.8)275
    Somewhat likely137 (24.0)310 (54.2)125 (21.9)572
    Very likely849 (35.5)1,295 (54.1)249 (10.4)2,393
    Total1,0731,7997213,593
Baseline mammography worry<0.0001123.21
    Low683 (34.4)1,043 (52.5)259 (13.1)1,641
    High414 (25.2)779 (47.5)448 (27.3)1,985
    Total1,0971,8227073,626
Baseline perceived cancer risk0.000527.58
    Much lower253 (27.7)431 (47.2)229 (25.1)913
    Somewhat lower334 (29.7)580 (51.6)211 (18.8)1,125
    About the same320 (31.84)506 (50.4)179 (17.8)1,005
    Somewhat higher122 (30.7)216 (54.3)60 (15.1)398
    Much higher30 (31.9)50 (53.2)14 (14.9)94
    Total1,0591,7836933,535
  • * N (row %).

  • No mammography uptake within the 12-mo follow-up period.

  • Total sample N = 3,701 (decreased and unequal n for individual variables due to missing data).