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Table 2 Adjusted odds ratio (aOR) of characteristics of adult and pediatric during the emergency department visit (appendicitis vs. non-appendicitis), NHAMCS 2005–2017

From: Prediction of acute appendicitis among patients with undifferentiated abdominal pain at emergency department

  Adult Pediatric
Crude Adjusted Crude Adjusted
Sex Famale Reference Reference Reference Reference
Male 2.156(1.846-2.518) 2.327(1.984-2.728) 2.070(1.595-2.686) 2.759(2.102-3.622)
Ethnicity Hispanic or Latino Reference Reference Reference Reference
Not Hispanic or Latino 0.749(0.619-0.907) 0.722(0.590-0.884) 0.888(0.683-1.156) 0.830(0.618-1.116)
Race White Reference Reference Reference Reference
Black/African American 0.438(0.337-0.571) 0.502(0.382-0.659) 0.276(0.175-0.437) 0.340(0.210-0.552)
Asian 1.784(1.202-2.648) 1.679(1.117-2.522) 0.715(0.315-1.621) 0.856(0.366-2.002)
Native Hawaiian/Other Pacific Islander 1.418(0.625-3.216) 1.442(0.627-3.314) 0.676(0.166-2.757) 0.704(0.159-3.124)
American Indian/Alaska Native 1.733(0.849-3.536) 1.853(0.888-3.863) 0.408(0.057-2.943) 0.508(0.068-3.816)
More than one race reported 0.715(0.176-2.904) 0.623(0.151-2.566) 0.888(0.217-3.633) 1.268(0.286-5.610)
Residence Private residence Reference Reference Reference Reference
Nursing home 0.091(0.013-0.645) 0.182(0.025-1.312) - -
Homeless/homeless shelter - - - -
Other 1.412(0.749-2.665) 1.646(0.856-3.165) 2.125(0.511-8.832) 1.690(0.373-7.664)
Insurance Private insurance Reference Reference Reference Reference
Medicare 0.262(0.200-0.342) 0.297(0.226-0.390) 0.364(0.089-1.487) 0.451(0.106-1.910)
Medicaid or CHIP or other state-based program 0.387(0.312-0.479) 0.462(0.370-0.578) 0.422(0.325-0.548) 0.691(0.517-0.923)
Worker’s compensation 1.319(0.317-5.484) 1.926(0.438-8.466) - -
Self-pay 0.600(0.474-0.760) 0.574(0.450-0.732) 0.608(0.353-1.047) 0.611(0.345-1.082)
No charge/Charity 0.764(0.391-1.495) 0.755(0.381-1.495) - -
Other 0.373(0.198-0.703) 0.378(0.199-0.717) 0.906(0.417-1.965) 1.142(0.489-2.667)
Visit year 2005 Reference Reference Reference Reference
2006 0.926(0.658-1.304) 0.857(0.604-1.215) 0.620(0.367-1.046) 0.813(0.464-1.425)
2007 0.854(0.607-1.202) 0.811(0.572-1.150) 0.512(0.283-0.926) 0.572(0.305-1.074)
2008 0.738(0.518-1.052) 0.730(0.508-1.048) 0.659(0.379-1.145) 0.701(0.388-1.265)
2009 0.650(0.455-0.929) 0.617(0.428-0.890) 0.355(0.210-0.601) 0.524(0.299-0.921)
2010 0.671(0.475-0.948) 0.633(0.443-0.903) 0.175(0.091-0.336) 0.253(0.127-0.502)
2011 0.790(0.565-1.107) 0.759(0.537-1.073) 0.371(0.214-0.642) 0.546(0.303-0.982)
2012 0.615(0.429-0.881) 0.598(0.413-0.866) 0.359(0.206-0.626) 0.432(0.238-0.784)
2013 0.359(0.230-0.559) 0.372(0.236-0.585) 0.367(0.207-0.651) 0.548(0.296-1.014)
2014 0.474(0.317-0.710) 0.475(0.314-0.719) 0.258(0.142-0.471) 0.385(0.203-0.729)
2015 0.392(0.250-0.615) 0.395(0.249-0.625) 0.302(0.162-0.566) 0.408(0.209-0.796)
2016 0.515(0.340-0.780) 1.076(0.601-1.927) 0.126(0.052-0.305) 0.363(0.142-0.929)
2017 0.388(0.239-0.630) 0.406(0.248-0.665) 0.303(0.157-0.585) 0.389(0.193-0.781)
Visit month January Reference Reference Reference Reference
February 0.917(0.624-1.349) 0.876(0.592-1.295) 0.944(0.512-1.740) 0.916(0.483-1.735)
March 0.971(0.670-1.405) 0.911(0.625-1.328) 0.776(0.405-1.486) 0.891(0.455-1.743)
April 0.873(0.598-1.275) 0.822(0.559-1.209) 0.793(0.414-1.519) 0.868(0.444-1.699)
May 0.976(0.676-1.409) 0.936(0.644-1.359) 1.053(0.579-1.913) 1.206(0.648-2.242)
June 0.998(0.690-1.443) 0.935(0.643-1.360) 0.915(0.483-1.734) 1.064(0.548-2.067)
July 1.033(0.719-1.484) 0.985(0.681-1.424) 0.913(0.477-1.750) 0.987(0.501-1.943)
August 0.948(0.659-1.363) 0.877(0.606-1.271) 1.189(0.654-2.162) 1.204(0.644-2.249)
September 1.012(0.701-1.461) 0.969(0.666-1.408) 1.945(1.142-3.313) 2.33(1.331-4.082)
October 0.963(0.658-1.410) 0.879(0.597-1.295) 1.699(0.977-2.957) 1.834(1.024-3.286)
November 0.778(0.526-1.152) 0.769(0.517-1.145) 0.885(0.472-1.660) 1.063(0.552-2.044)
December 0.971(0.666-1.416) 0.950(0.648-1.395) 0.962(0.513-1.805) 1.244(0.645-2.400)
Visit day Sunday Reference Reference Reference Reference
Monday 0.945(0.699-1.278) 0.954(0.703-1.295) 0.975(0.617-1.541) 0.903(0.559-1.458)
Tuesday 1.202(0.899-1.606) 1.222(0.910-1.640) 0.842(0.517-1.372) 0.842(0.507-1.400)
Wednesday 1.152(0.859-1.544) 1.163(0.864-1.566) 1.403(0.904-2.178) 1.370(0.862-2.178)
Thursday 1.056(0.782-1.427) 1.086(0.801-1.474) 1.199(0.763-1.884) 1.182(0.735-1.900)
Friday 1.225(0.913-1.645) 1.300(0.963-1.753) 1.080(0.674-1.730) 1.086(0.662-1.781)
Saturday 1.009(0.742-1.374) 1.032(0.755-1.411) 1.074(0.677-1.703) 0.987(0.608-1.603)
Arrival time Morning Reference Reference Reference Reference
Afternoon 0.904(0.736-1.110) 0.953(0.774-1.175) 1.314(0.919-1.878) 1.355(0.931-1.972)
Evening 0.887(0.709-1.108) 0.900(0.718-1.129) 0.935(0.645-1.356) 0.956(0.648-1.409)
Night 0.927(0.747-1.151) 0.872(0.700-1.086) 0.931(0.648-1.338) 0.911(0.624-1.332)
Triage level Immediate Reference Reference Reference Reference
Emergent 0.609(0.372-0.996) 0.596(0.358-0.990) 0.501(0.222-1.129) 0.671(0.267-1.684)
Urgent 0.412(0.263-0.645) 0.447(0.279-0.715) 0.269(0.128-0.568) 0.346(0.146-0.820)
Semi-urgent 0.208(0.125-0.347) 0.234(0.138-0.398) 0.083(0.037-0.184) 0.176(0.071-0.439)
Nonurgent 0.208(0.101-0.428) 0.213(0.103-0.444) 0.108(0.039-0.295) 0.213(0.070-0.644)
Is injury/poisoning intentional Intentional Reference Reference Reference Reference
Unintentional 0.408(0.091-1.842) 0.293(0.062-1.395) - -
Questionable injury status 1.779(0.440-7.199) 0.216(0.037-1.249) - -
Visit related to an injury/poison/adverse effect of medical treatment within 72 hours No Reference Reference Reference Reference
Yes 0.176(0.097-0.320) 0.119(0.042-0.339) - -
72h Revisit Yes Reference Reference Reference Reference
No 1.482(0.966-2.275) 1.374(0.890-2.122) 1.008(0.532-1.910) 0.893(0.458-1.740)
Pain level Mild Reference Reference Reference Reference
Moderate 2.221(1.674-2.948) 2.016(1.513-2.687) 6.562(4.504-9.561) 5.291(3.587-7.805)
Very severe 2.556(1.949-3.351) 2.527(1.915-3.335) 10.504(7.164-15.401) 8.094(5.414-12.099)
Diagnostic services provided No Reference Reference Reference Reference
Yes 1.919(1.424-2.588) 2.268(1.445-3.560) 6.093(3.893-9.538) 3.385(2.106-5.441)