Table 3.

Stratified analysis of factors by key departments

Variable	Surgical (n = 7961)	Medical (n = 6848)	ENT (n = 1935)	Ophthalmology (n = 3721)	Therapy (n = 613)	Others (n = 574)
Age group
Up to 20 years	1	1	1	1	1	1
21 to 30 years	0.77*	0.99	0.88	1.36	1.12	0.87
31 to 40 years	0.85	0.81	0.76	1.25	1.12	1.23
41 to 50 years	0.71*	0.7*	0.52*	0.87	0.88	0.81
51 to 60 years	0.71*	0.66*	0.49*	0.62*	0.6	0.42
More than 60 years	0.89	0.69*	0.86	1.1	0.62	0.79
Race
Chinese	1	1	1	1	1	1
Malay	1.69*	1.53*	1.26	1.35	0.98	0.91
Indian	1.44*	1.67*	1.53	1.85*	1.11	5.28*
Others	1.01	0.95	1.19	1.17	0.85	0.7
Days from scheduling to actual appointment
Up to 7 days	1	1	1	1	1	1
7 to 21 days	1.46*	1.36*	1.1	0.95	2.07*	0.78
More than 21 days	2.77*	2.7*	2.28*	1.99*	0.64	2.8*
Percentage of previous failed appointments
Up to 20%	1	1	1	1	1	1
21% to 40%	0.7*	1.37*	0.49*	0.97	1.24	1.18
41% to 60%	0.86	1.7*	1.06	1.21	1.98*	1.06
More than 60%	1.26*	3.1*	1.39	1.41*	1.59	3.25*
No previous appointment	3.84*	5.96*	4.07*	3.24*	1.86	4.37*
Provided cell phone number	0.07*	0.1*	0.06*	0.17*	0.15*	0.15*
Approximate distance from TTSH
<6 km	1	1	1	1	1	1
6 to 14 km	1.04	1.06	0.81	1.07	1.02	1.07
>14 km	1.13	1.12	0.86	1.34*	0.98	1.46

Numbers presented within the table represent adjusted odds ratios. The baseline comparison group has an odds ratio of 1 and is italicised. Odds ratios significant at a level of p < 0.05 are indicated with an asterisk "*".