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Table 1 Demographic characteristics and univariate factors associated with failed appointments, with the corresponding number of subjects (n), odds ratios, confidence intervals, and p-values (overall n = 22864).

From: Predictors of failed attendances in a multi-specialty outpatient centre using electronic databases

Variable n (%)                   OR        95% CI p-value
Gender     
   Male 12453 (54%) 1   
   Female 10411 (46%) 0.94 (0.90, 0.99) 0.035
Race     
   Chinese 16951 (74%) 1   
   Malay 2073 (9%) 1.51 (1.38, 1.66) <0.001
   Indian 2120 (9%) 1.73 (1.58, 1.90) <0.001
   Others 1715 (8%) 1.42 (1.29, 1.57) <0.001
Age group     
   Up to 20 years 2002 (9%) 1   
   21 to 30 years 4298 (19%) 0.99 (0.89, 1.10) 0.838
   31 to 40 years 4190 (18%) 0.97 (0.87, 1.08) 0.621
   41 to 50 years 3992 (17%) 0.76 (0.68, 0.84) <0.001
   51 to 60 years 3265 (14%) 0.67 (0.60, 0.75) <0.001
   More than 60 years 5137 (22%) 0.75 (0.68, 0.84) <0.001
Days from scheduling to actual appointment     
   Up to 7 days 5852 (26%) 1   
   7 to 21 days 7234 (32%) 1.05 (0.98, 1.13) 0.144
   More than 21 days 9840 (43%) 1.24 (1.16, 1.33) <0.001
Percentage of previous failed appointments     
   Up to 20% 5288 (23%) 1   
   21% to 40% 3584 (16%) 1.14 (1.04, 1.25) 0.007
   41% to 60% 3596 (16%) 1.41 (1.29, 1.55) <0.001
   More than 60% 4414 (19%) 1.95 (1.79, 2.13) <0.001
   No previous appointment 6044 (26%) 4.67 (4.31, 5.06) <0.001
Provided cell phone number 13813 (60%) 0.09 (0.09, 0.10) <0.001
Approximate distance from TTSH     
   <6 km 8114 (37%) 1   
   6 to 14 km 8427 (39%) 0.99 (0.93, 1.06) 0.844
   >14 km 5248 (24%) 1.11 (1.04, 1.20) 0.003
Admitted     
   During appointment date 182 (1%) 0.86 (0.63, 1.16) 0.320
   Between appointment scheduling date and actual appointment date 423 (2%) 0.87 (0.71, 1.07) 0.183
Department     
   Surgical 7961 (37%) 1   
   Medical 6848 (32%) 1.06 (0.99, 1.13) 0.106
   ENT 1935 (9%) 1.14 (1.03, 1.27) 0.014
   Ophthalmology 3721 (17%) 1.13 (1.04, 1.23) 0.004
   Therapy 613 (3%) 2.64 (2.23, 3.11) <0.001
   Others 574 (3%) 13.4 (10.49, 17.11) <0.001