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Table 2 Demographic, clinical and hospital characteristics

From: Impact of frailty on inpatient outcomes in thyroid cancer surgery: 10-year results from the U.S. national inpatient sample

  All patients
(n = 38,202)
Non-frailty
(n = 37,900)
Frailty
(n = 302)
p-value
Age group     < 0.0001
 < 45 13,448
(35.20%)
13,400
(35.36%)
48
(15.89%)
 
 45–64 16,189
(42.38%)
16,089
(42.45%)
100
(33.11%)
 
 65+ 8565
(22.42%)
8411
(22.19%)
154
(50.99%)
 
Gender     < 0.0001
 Female 27,898
(73.54%)
27,721
(73.66%)
177
(58.61%)
 
 Male 10,036
(26.46%)
9911
(26.34%)
125
(41.39%)
 
 Missing 268    
Race     < 0.0001
 White 23,203
(60.74%)
23,023
(60.75%)
180
(59.60%)
 
 Black 2261
(5.92%)
2229
(5.88%)
32
(10.60%)
 
 Hispanic 3919
(10.26%)
3878
(10.23%)
41
(13.58%)
 
 Asian/Pacific Islander 1920
(5.03%)
1914
(5.05%)
6
(1.99%)
 
 Others 6899
(18.06%)
6856
(18.09%)
43
(14.24%)
 
Household income     < 0.0001
 0-25th percentile 6985
(18.69%)
6897
(18.61%)
88
(29.73%)
 
 26th–50th percentile 8268
(22.13%)
8182
(22.07%)
86
(29.05%)
 
 51th–75th percentile 9358
(25.04%)
9298
(25.08%)
60
(20.27%)
 
 76th–100th percentile 12,754
(34.13%)
12,692
(34.24%)
62
(20.95%)
 
 Missing 837    
Insurance status/Primary Payer     < 0.0001
 Medicare/Medicaid 11,963
(31.35%)
11,762
(31.07%)
201
(66.56%)
 
 Non-Medicare 26,196
(68.65%)
26,095
(68.93%)
101
(33.44%)
 
 Missing 43    
Admission type     < 0.0001
 Elective (ref) 34,307
(90.05%)
34,106
(90.24%)
201
(66.78%)
 
 Emergent 3790
(9.95%)
3690
(9.76%)
100
(32.22%)
 
Procedure type     0.001
 Unilateral/partial thyroidectomy 9270
(24.27%)
9178
(24.22%)
92
(30.46%)
 
 Total (complete) thyroidectomy 27,715
(72.55%)
27,522
(72.62%)
193
(63.91%)
 
 Substernal 1217
(3.19%)
1200
(3.17%)
17
(5.63%)
 
Required cervical LN dissection     < 0.0001
 No (ref) 29,102
(76.18%)
28,918
(76.30%)
184
(60.93%)
 
 Yes 9100
(23.82%)
8982
(23.70%)
118
(39.07%)
 
Metastasis to the lungs     < 0.0001
 No (ref) 37,417
(97.95%)
37,171
(98.08%)
246
(81.46%)
 
 Yes 785
(2.05%)
729
(1.92%)
56
(18.54%)
 
Metastasis to the bone     < 0.0001
 No (ref) 37,984
(99.43%)
37,700
(99.47%)
284
(94.04%)
 
 Yes 218
(0.57%)
200
(0.53%)
18
(5.96%)
 
Smoking     0.133
 None (ref) 32,391
(84.79%)
32,134
(84.79%)
257
(85.10%)
 
 Former 3193
(8.36%)
3175
(8.38%)
18
(5.96%)
 
Current 2618
(8.94%)
2591
(6.84%)
27
(8.94%)
 
Overweight and obesity     0.198
 No (ref) 34,484
(90.27%)
34,218
(90.28%)
266
(88.08%)
 
 Yes 3718
(9.73%)
3682
(9.72%)
36
(11.92%)
 
CCI    
 0–1 (ref) 33,916
(88.78%)
33,722
(88.98%)
194
(64.24%)
 
 2 2927
(7.66%)
2864
(7.56%)
63
(20.86%)
 
 3+ 1359
(3.56%)
1314
(3.47%)
45
(14.90%)
 
Hospital characteristics     
 Hospital bed size     0.348
 Small (ref) 4245
(11.16%)
4220
(11.18%)
25
(8.50%)
 
 Medium 7228
(19.00%)
7170
(19.00%)
7228
(19.00%)
 
 Large 26,566
(69.84%)
26,355
(69.82%)
211
(71.77%)
 
 Missing 163    
 Location/teaching status     0.326
 Rural 1940
(5.10%)
1926
(5.10%)
14
(4.76%)
 
 Urban nonteaching 11,264
(29.61%)
11,188
(29.64%)
76
(25.85%)
 
 Urban teaching 24,835
(65.29%)
24,631
(65.26%)
204
(69.39%)
 
 Missing 163    
 Hospital region     < 0.0001
 Northeast (ref) 12,236
(32.03%)
12,184
(32.15%)
52
(17.22%)
 
 Midwest 6444
(16.87%)
6378
(16.83%)
66
(21.85%)
 
 South 9563
(23.03%)
9456
(24.95%)
107
(35.43%)
 
 West 9959
(26.07%)
9882
(26.07%)
77
(25.50%)
 
 Hospital volume (surgeries/year)     < 0.0001
 Low (< 8) 12,042
(31.52%)
11,901
(31.40%)
141
(46.69%)
 
 Intermediate (8–44) 17,107
(44.78%)
16,983
(44.81%)
124
(41.06%)
 
 High (> 44) 9053
(23.70%)
9016
(23.79%)
37
(12.25%)