Regional short-term climate variations influence on the number of visits for renal colic in a large urban Emergency Department: results of a 7-year survey.
The pathogenesis of renal stones is an intricate process and varies widely depending on the composition of stones. There is also a marked geographic variability, strongly attributable to the mean annual temperature (MAT) and, to a lesser extent, on the seasons. Previous investigations report peaks in Emergency Department (ED) visits for renal colic during the summer. The aim of the present investigation is to assess the influence of day-by-day climate changes on the number of visits due to renal colic in our ED (city of Parma, located in the Po river valley, with a temperate continental climate). A total of 8,168 colic episodes were retrieved from our database during a period of 2,557 days (from 1 January 2002 to 31 December 2008). Over the same period 557,990 patients were admitted to our ED, renal colic visits representing 1.46% of the total. The linear regression analysis fitting the mean number of colic visits per day and the mean daily temperature displays a very high and significant correlation (R = 0.88, p < 0.0001). A multiple linear regression analysis between the mean temperature of each of the 30 days preceding the colic episode also shows strong correlations, being the strongest on the 5th-7th days (R = 0.80, p < 0.0001 on the 6th day before the colic episode), and a weaker but highly significant correlation on days 14 (R = 0.77, p < 0.0001) and 20 (R = 0.70, p < 0.0001) before the colic episode. Taken together, these findings suggest a kind of "acceleration" process of stone formation caused by the hot climate and, perhaps, by dietary variations during the summer. This process might trigger a sudden growth of the stone and, finally, the resulting clinical episode.
U.O. Pronto Soccorso e Medicina d'Urgenza, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126, Parma, Italy. gcervellin@ao.pr.it
Gianfranco
G
Cervellin
Ivan
I
Comelli
Denis
D
Comelli
Pietro
P
Cortellini
Giuseppe
G
Lippi
Tiziana
T
Meschi
Loris
L
Borghi
D002980:Climate; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005843:Geography; D019538:Health Care Surveys; D006786:Hospitals, Urban / Q000706:statistics & numerical data*; D006801:Humans; D007558:Italy / Q000453:epidemiology; D016014:Linear Models; D056844:Renal Colic / Q000453:epidemiology / Q000473:pathology*; D013696:Temperature; D013997:Time Factors
J Pak Med Assoc. 2004 Jan;54(1):6-8
15058633
J Urol. 2005 Mar;173(3):848-57
15711292
Eur J Emerg Med. 2010 Dec;17(6):328-31
20038843
J Am Soc Nephrol. 2004 Dec;15(12):3225-32
15579526
Urology. 2005 May;65(5):858-61
15882711
J Urol. 1996 Mar;155(3):839-43
8583588
Aviat Space Environ Med. 2006 Jun;77(6):649-53
16780245
Semin Nephrol. 2003 Jan;23(1):77-87
12563603
J Urol. 2008 Feb;179(2):564-9
18082222
Ann R Coll Surg Engl. 1967 Mar;40(3):155-78
6020812
N Engl J Med. 2002 Jan 10;346(2):77-84
11784873
Eur J Epidemiol. 1997 Feb;13(2):229-34
9085010
J Natl Med Assoc. 1989 Jun;81(6):695-8
2746692
J Urol. 2005 Mar;173(3):858-61
15711293
J Urol. 1960 May;83:561-5
14434918
Eur Urol. 1979;5(1):26-8
428407
Clin J Am Soc Nephrol. 2006 Nov;1(6):1269-74
17699358
Arch Intern Med. 2004 Apr 26;164(8):885-91
15111375
Trop Geogr Med. 1978 Dec;30(4):477-81
749283
Am J Emerg Med. 2004 Nov;22(7):560-3
15666261
J Urol. 1993 Dec;150(6):1757-60
8230496
Urol Int. 2008;80(1):19-25
18204228
Intern Emerg Med. 2008 Sep;3(3):241-4
18437291
Proc Natl Acad Sci U S A. 2008 Jul 15;105(28):9841-6
18626008
Curr Opin Urol. 2002 Jul;12(4):263-9
12072644
Br J Urol. 1977 Aug;49(4):269-75
912251
J Urol. 2006 Dec;176(6 Pt 1):2483-7; discussion 2487
17085135
Kidney Int. 2003 May;63(5):1817-23
12675858
Clin J Am Soc Nephrol. 2008 Sep;3(5):1453-60
18650406
J Pak Med Assoc. 1997 Nov;47(11):281-4
9510632
Scand J Urol Nephrol. 1983;17(3):313-9
6648378
Am J Epidemiol. 1996 Feb 1;143(3):240-7
8561157
Eur Urol. 2000 Jan;37(1):23-5
10671780
Br Med J. 1978 Jan 14;1(6105):67-70
620201
J Urol. 2003 Aug;170(2 Pt 1):397-401
12853784
Kidney Int. 1979 Nov;16(5):624-31
548606
N Engl J Med. 2010 Sep 2;363(10):954-63
20818905