Table 1. Comparison of demographic variables between patients with and those without a recurrent injurious fall requiring hospitalization in Taiwan, 2001–2010.

Variable	Single injurious fall		Recurrent injurious fall		P
	(N = 485 070)		(N = 19 442)
	n	%	n	%
Sex
Female	232 337	95.69	10 464	4.31	< .0001a
Male	249 163	96.54	8 940	3.46
Missingd	3 570	0.74	38	0.20
Mean age (SD) (years)	55.91	(24.67)	66.93	(20.24)	< .0001b
Age group (years)
0–17	55 122	98.80	668	1.20	< .0001c
18–39	66 698	97.65	1608	2.35
40–64	144 550	97.12	4290	2.88
65–74	80 374	95.43	3851	4.57
75+	134 755	93.75	8987	6.25
Missingd	3571	0.74	38	0.20
Enrollee category
Self-insured	311 037	95.93	13 193	4.07	< .0001a
Dependent	172 947	96.53	6 222	3.47
Missingd	1 086	0.22	27	0.14
Insurance premiums (NTD/month)
0–19 200	267 004	95.81	11 672	4.19	< .0001c
19 201–24 000	102 746	96.01	4 269	3.99
24 001+	114 234	97.05	3 474	2.95
Missingd	1 086	0.22	27	0.14
Marital status
Single	106  094	97.82	2 367	2.18	< .0001a
Married	246  023	96.18	9 784	3.82
Divorced	27  847	95.81	1 217	4.19
Widowed	97  979	94.25	5 976	5.75
Missingd	7 127	1.47	98	0.50
Place of enrollment
1 (Most urbanized)	101 034	96.59	3 562	3.41	< .0001c
2	138 401	96.39	5 178	3.61
3	81 231	96.26	3 160	3.74
4	91 977	95.69	4 145	4.31
5	15 462	95.21	778	4.79
6	31 274	95.54	1 460	4.46
7 (Least urbanized)	22 971	95.62	1 052	4.38
Missingd	2 720	0.56	107	0.55

SD, standard deviation; NTD, New Taiwan dollar

^a Pearson chi-squared test

^b t test

^c Cochran–Armitage trend test

^d Missing values in the table represent frequencies (column percentage)