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Table 1 Characteristics at baseline for all patients and patients with a colonoscopy

From: Development of a multivariable prediction model to identify patients unlikely to complete a colonoscopy following an abnormal FIT test in community clinics

  All Patients With Colonoscopy Univariate Likelihood Ratio
  N (% of all) N (% row) HR p-value
All 1596 100.00% 556 34.80%   
Age 0.0040
50–54 498 31.20% 200 40.20% ref  
55–59 425 26.60% 156 36.70% 0.91  
60–64 377 23.60% 122 32.40% 0.76  
65–69 202 12.70% 62 30.70% 0.71  
70–75 94 5.90% 16 17.00% 0.37  
Sex 0.4032
 Male 757 47.40% 275 36.30% ref  
 Female 839 52.60% 281 33.50% 0.9  
BMI 0.1467
  < 24 420 26.30% 143 34.10% ref  
 25–29 453 28.40% 149 32.90% 0.98  
 30–34 349 21.90% 137 39.30% 1.22  
 35–39 209 13.10% 65 31.10% 0.89  
 40+ 165 10.30% 62 37.60% 1.15  
Language 0.0780
 Non-English 312 19.60% 95 30.50% ref  
 English 1284 80.50% 461 35.90% 1.26  
Race 0.0599
Non-White 266 16.70% 72 27.10% ref  
White 1330 83.30% 484 36.40% 1.48  
Ethnicity 0.0270
 Non-Hispanic 1445 90.50% 496 34.30% ref  
 Hispanic 151 9.50% 60 39.70% 1.21  
Insurance 0.5652
Uninsured 265 16.60% 86 32.50% ref  
Medicaid 748 46.90% 282 37.70% 1.18  
Medicare 435 27.30% 136 31.30% 0.94  
Commercial 148 9.30% 52 35.10% 1.1  
Tobacco Use 0.9812
 Never/Quit 1153 72.20% 393 34.10% ref  
 Current User 443 27.80% 163 36.80% 1.11  
Percent of Census Tract with College Degree 0.0697
 4.9–14.6 346 21.70% 125 36.10% ref  
 14.7–19.9 337 21.10% 96 28.50% 0.73  
 19.9–25.7 324 20.30% 125 38.60% 1.08  
 26.0–36.8 282 17.70% 94 33.30% 0.88  
 36.9–77.7 307 19.20% 116 37.80% 1.04  
Percent of Census Tract Households below FPL 0.2315
 2.7–11.4 283 17.70% 105 37.10% ref  
 11.4–14.8 288 18.10% 100 34.70% 0.91  
 14.9–19.4 309 19.40% 105 34.00% 0.89  
 19.5–25.8 333 20.90% 131 39.30% 1.05  
 26.1–53.9 383 24.00% 115 30.00% 0.75  
Census Tract Median Household Income 0.6530
 $14,000 - $36,000 331 20.70% 101 30.50% ref  
 $36,000 - $41,000 330 20.70% 125 37.90% 1.32  
 $41,000 - $47,000 353 22.10% 117 33.10% 1.11  
 $47,000 - $56,000 286 17.90% 101 35.30% 1.18  
 $56,000 - $149,000 296 18.60% 112 37.80% 1.33  
Census Tract Unemployment 0.0009
 2.6–8.1 323 20.20% 132 40.90% ref  
 8.2–10.2 285 17.90% 83 29.10% 0.65  
 10.2–12.7 293 18.40% 88 30.00% 0.68  
 12.7–15 397 24.90% 146 36.80% 0.87  
 15.0–32.4 298 18.70% 107 35.90% 0.84  
Census Tract Population Density (People per square mile of land area) 0.2521
 0.8–174 238 14.90% 96 40.30% ref  
 176–1571 217 13.60% 62 28.60% 0.67  
 1574 - 3770 289 18.10% 83 28.70% 0.64  
 3781 - 6576 358 22.40% 144 40.20% 0.98  
 6593 - 26,873 494 31.00% 171 34.60% 0.8  
Census Tract GINI Income Inequality 0.4162
0.27–0.38 329 20.60% 102 31.00% ref  
0.38–0.41 326 20.40% 115 35.30% 1.15  
0.41–0.43 326 20.40% 122 37.40% 1.24  
0.43–0.47 256 16.00% 97 37.90% 1.26  
0.47–0.82 359 22.50% 120 33.40% 1.09  
Low access Census Tract at 1/2 mile for urban areas or 5 miles for rural areas 0.8152
 No 309 19.40% 121 39.20% ref  
 Yes 1287 80.60% 435 33.80% 0.81  
Emergency Room Visits per 1000 Medicare Enrollees (County) 0.7264
 0 356 22.30% 107 30.10% ref  
 1 914 57.30% 337 36.90% 1.24  
 2+ 326 20.40% 112 34.40% 1.16  
Urban/Rural County 0.7809
 Cluster (10-50 k population) 276 17.30% 84 30.40% ref  
 Rural (< 10 K population) 246 15.40% 97 39.40% 1.39  
 Urban (50 k + population) 1074 67.30% 375 34.90% 1.16  
Charlson Comorbidity 0.7870
 0 705 44.20% 259 36.70% ref  
 1 465 29.10% 159 34.20% 0.94  
 2 213 13.40% 71 33.30% 0.89  
 3+ 213 13.40% 67 31.50% 0.83  
Asthma/COPD dx in 2 years prior to index 0.1816
 No 1122 70.30% 404 36.00% ref  
 Yes 474 29.70% 152 32.10% 0.87  
Diabetes dx in 2 years prior to index 0.2072
 No 881 55.20% 322 36.60% ref  
 Yes 715 44.80% 234 32.70% 0.86  
Severe mental illness 0.7889
 No 1455 91.20% 504 34.60% ref  
 Yes 141 8.80% 52 36.90% 1.09  
Mood disorder (Depression, Bipolar) dx in 2 years prior to index 0.6492
 No 1006 63.00% 342 34.00% ref  
 Yes 590 37.00% 214 36.30% 1.1  
Substance/alcohol abuse dx in 2 years prior to index 0.6928
 No 1264 79.20% 434 34.30% ref  
 Yes 332 20.80% 122 36.80% 1.14  
Long term anticoagulant use 0.0353
No 1545 96.80% 546 35.30% ref  
Yes 51 3.20% 10 19.60% 0.5  
Blood in Stool prior to abnormal FIT 0.3026
 No 1538 96.40% 538 35.00% ref  
 Yes 58 3.60% 18 31.00% 0.86  
Hemorrhoid/Anal Fissure prior to abnormal FIT 0.3546
 No 1514 94.90% 526 34.70% ref  
 Yes 82 5.10% 30 36.60% 1.08  
Prior CRC screening 0.2966
 No 985 61.70% 362 36.80% ref  
 Yes 611 38.30% 194 31.80% 0.82  
Flu shot within 1 year of index date 0.0000
No 1368 85.70% 452 33.00% ref  
Yes 228 14.30% 104 45.60% 1.57  
Number of outpatient encounters in the year prior to index date 0.3248
 0 203 12.70% 85 41.90% ref  
 1 173 10.80% 52 30.10% 0.65  
 2 196 12.30% 59 30.10% 0.64  
 3 209 13.10% 80 38.30% 0.86  
 4 147 9.20% 50 34.00% 0.73  
 5 119 7.50% 42 35.30% 0.79  
 6+ 549 34.40% 188 34.20% 0.77  
Count of no-show encounters in the year prior to index date 0.0022
0 1128 70.70% 394 34.90% ref  
1 253 15.90% 99 39.10% 1.16  
2+ 215 13.50% 63 29.30% 0.82  
Health Center 0.0000
HC 8 155 9.70% 31 20.00% ref  
HC 7 70 4.40% 19 27.10% 1.45  
HC 4 104 6.50% 44 42.30% 2.57  
HC 2 615 38.50% 193 31.40% 1.62  
HC 5 287 18.00% 139 48.40% 3.03  
HC 6 232 14.50% 66 28.50% 1.43  
HC 3 133 8.30% 64 48.10% 3.12