TABLE 2

Mean Laboratory Values of 179 Patients With Acute Monoarticular Arthritis

VariableLyme (N = 55), Mean ± SDSeptic (N = 46), Mean ± SDNonseptic Non-Lyme (N = 46), Mean ± SDP
Peripheral WBC count, 103 cells per μL10.9 ± 312.4 ± 7.110.6 ± 3.4.09
Peripheral ANC, 103 cells per μL7 ± 2.28.1 ± 3.76.7 ± 2.7.02
ESR, mm/h44.6 ± 2062.7 ± 32.133.5 ± 25.7<.001
CRP, mg/dL3.6 ± 3.211.4 ± 7.94.3 ± 6.1<.001
Joint fluid
    WBC count, 103 cells per μL46.4 ± 31.8102.5 ± 183.127.5 ± 33<.001
    Neutrophils, %85 ± 989 ± 962 ± 32<.001
    Lymphocytes, %3 ± 53 ± 312 ± 17<.001
    Monocytes, %11 ± 88 ± 919 ± 22<.001