Decreasing incidence of tibial shaft fractures between 1998 and 2004: Information based on 10,627 Swedish inpatients

Figures & data

Figure 1. Number of hospital admissions for tibial shaft fractures in Sweden during the period 1998-2004, stratified by sex and age group.

Table 1.  Descriptive data on tibial shaft fractures in Sweden during the period 1998–2004, related to age

	Number of admissions			Incidence rate /100,000 pyr			Incidence rate ratio,
Age	Men	Women	Total (%)	Men	Women	Total	men/women (95% CI)
<10	818	447	1,265(12)	22.2	12.8	17.6	1.7 ^a (1.5–2.0)
10-19	1,591	520	2,111 (20)	39.4	13.6	26.9	3.0 ^a (2.8–3.4)
20-29	961	226	1,187(11)	24.6	6.0	15.5	4.1 ^a (3.5–4.8)
30-39	771	284	1,055(10)	17.0	6.6	11.9	2.6 ^a (2.3–3.0)
40-49	775	483	1,258(12)	18.5	11.9	15.2	1.6 ^a (1.4–1.7)
50-59	775	665	1,440(14)	17.9	15.6	16.8	1.1 ^a (1.0–1.3)
60–69	429	478	907 (8)	14.6	15.7	15.2	0.9 (0.8–1.1)
70-79	286	463	749 (7)	13.3	17.2	15.5	0.8 ^a (0.7–0.9)
80-89	126	386	512(5)	12.4	22.4	18.6	0.6 ^a (0.4–0.7)
>90	18	125	143(1)	14.9	36.0	30.6	0.4 ^a (0.2–0.7)
Pyr: person‐years. ^a p < 0.05.

Table 2.  Descriptive data of tibial shaft fractures in Sweden during the period 1998–2004 related to year of occurrence

	Number of admissions			Incidence rate /100,000 pyr			Incidence rate ratio, men/women (95% CI)
Age	Men	Women	Total	Men	Women	Total	men/women (95% CI)
1998	1,035	624	1,659	23.7	13.9	18.7	1.7 ^a (1.5–1.9)
1999	927	624	1,551	21.2	13.9	17.5	1.5 ^a (1.4–1.7)
2000	924	573	1,497	21.0	12.8	16.9	1.6 ^a (1.5–1.8)
2001	927	596	1,523	21.0	13.2	17.1	1.6 ^a (1.4–1.8)
2002	953	535	1,488	21.5	11.9	16.6	1.8 ^a (1.6–2.0)
2003	920	539	1,459	20.7	11.9	16.3	1.7 ^a (1.6–1.9)
2004	864	586	1,450	19.3	12.9	16.1	1.5 ^a (1.3–1.7)
Total	6,550	4,077	10,627	21.2	12.9	17.0	1.6 ^a (1.5–1.7)
Pyr: person-years.^a p < 0.05.

Figure 2. Crude incidence rates per 100,000 person-years (pyr) of tibial shaft fractures in Sweden during the period 1998-2004, stratified by sex and year. Data were analyzed by linear regression analysis (total: B = -0.4, p = 0.003; men: B = -0.5, p = 0.03; women: B = -0.3, p = 0.06).

Figure 3. Incidence rates per 100,000 person-years (pyr) of tibial shaft fractures in Sweden during the period 1998-2004, stratified by sex and age group.^a p < 0.05, indicating statistically significant incidence rate ratio between men and women.

Table 3.  Mechanisms of injury

	Men	%	Women	%	Total	%
Fall on same level	2,819	55	2,291	45	5,110	48
Fall from height	442	61	281	39	723	7
Fall unspecified	544	56	425	44	969	9
Transport accident	1,522	69	683	31	2,205	21
Miscellaneous	1,007	78	285	22	1,292	12
Not reported	216	66	112	34	328	3

Figure 4. Temporal trends in length of admission associated with tibial shaft fractures in Sweden during the period 1998-2004, investigated using logistic regression analysis where 0-2 days is the comparison group and 1998 is the baseline year.