Table 1

Demographic and clinical characteristics and initial laboratory test results from patients in town of Lianzhou presenting with unexplained myalgia in 2009*
Variable Total (n = 54) Male (n = 36) Female (n = 18) P-value*
Age, years 0.291
Mean 42 41 45
Median 43 42 43
Range 4-74 4-71 22-74
Clinical characteristics, n(%)
Weakness 45 (83.3) 30 (83.3) 15 (83.3) 1.000
Myalgia 41 (75.9) 28 (77.8) 13 (72.2) 0.740
Nausea 34 (63.0) 23 (63.9) 11 (61.1) 0.842
Abdominal pain 34 (63.0) 24 (66.7) 10 (55.6) 0.425
Laboratory test values, mean ± SD
Serological test
α-HBDH, U/L 357.9 ± 309.6 394.1 ± 342.4 245.7 ± 129.1 0.268
CK, U/L 2812.3 ± 3350.8 3239.5 ± 3674.8 1488.1 ± 1520.0 0.213
AST, U/L 166.7 ± 227.9 193.8 ± 255.4 82.6 ± 55.6 0.514
CK-MB, U/L 99.2 ± 127.0 114.5 ± 141.0 51.9 ± 45.9 0.208
CK-MB Fraction,% 6.0 ± 5.4 5.8 ± 5.1 6.8 ± 6.2 0.632
LDH,U/L 428.4 ± 362.0 473.7 ± 400.2 288.1 ± 137.9 0.302
TBA, μmol/L 25.5 ± 7.00 23.8 ± 6.9 30.6 ± 4.1 0.006
ALT, U/L 64.1 ± 65.8 67.2 ± 72.5 54.6 ± 39.3 0.927
Renal function test
Cr, μmol/L 74.9 ± 15.3 77.0 ± 15.1 67.5 ± 14.9 0.133
BUN, mmol/L 5.3 ± 1.5 5.5 ± 1.3 4.4 ± 1.6 0.048
Urinalysis
SG 1.02 ± 0.007 1.021 ± 0.007 1.020 ± 0.008 0.830

*: Data of demographic and clinical characteristics are for all patients identified; data of laboratory test values are for patients who presented to the county level hospital and were taken blood samples for tests.

*: Fisher’s Exact Test and Pearson Chi-Square Test were used for proportions, the Mann–Whitney U test was used for gender distribution.

Huang et al.

Huang et al. BMC Public Health 2013 13:447   doi:10.1186/1471-2458-13-447

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