Prosthetic Joint Infection Incidence, Climate Variables, and Cultures by Month From 2012 to 2015
| Month | TJA, n | PJI, n (%) | Average High Temperature, °F | Average Low Temperature, °F | Average Humidity, % | Average Precipitation, Inches | Cultures |
|---|---|---|---|---|---|---|---|
| January | 398 | 3 (0.75) | 62 | 45 | 76 | 5.15 | MSSA (2) MRSA |
| February | 345 | 4 (1.16) | 65 | 48 | 73 | 5.46 | Gemella morbillorum Staphylococcus epidermidis NG (2) |
| March | 307 | 2 (0.65) | 72 | 54 | 73 | 4.55 | Candida albicans Skin flora |
| April | 284 | 3 (1.06) | 78 | 60 | 73 | 4.61 | Enterococcus faecalis MSSA Serratia marcescens |
| May | 306 | 2 (0.65) | 85 | 68 | 73 | 4.63 | Corynebacterium jeikeium MRSA |
| June | 294 | 3 (1.02) | 90 | 74 | 76 | 8.06 | Enterococcus faecalis NG (2) |
| July | 250 | 3 (1.20) | 91 | 75 | 79 | 5.93 | GBS Klebsiella pneumoniae-ESBL MSSA |
| August | 268 | 4 (1.49) | 91 | 75 | 79 | 5.98 | Streptococcus dysgalactiae NG (3) |
| September | 278 | 1 (0.36) | 88 | 72 | 78 | 5.05 | MSSA |
| October | 334 | 2 (0.60) | 80 | 63 | 75 | 3.58 | MAC Serratia marcescens |
| November | 345 | 1 (0.29) | 72 | 54 | 77 | 4.49 | NG |
| December | 287 | 0 (0.00) | 64 | 47 | 77 | 5.33 | – |
| PJI vs climate variable, P value | 0.5 | 0.5 | 0.5 | 0.5 | |||
ESBL, extended spectrum beta-lactamase; GBS, group B streptococcus; MAC, Mycobacterium avium complex; MRSA, methicillin-resistant Staphylococcus aureus; MSSA, methicillin-susceptible Staphylococcus aureus; NG, no growth; PJI, prosthetic joint infection; TJA, total joint arthroplasty.