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. 2015 Dec 8;120(1):80–89. doi: 10.1111/jam.12974

Table 1.

Spore population densities on pre‐ and post‐test control (nonexposed) coupons

Coupon subtrate Pretest population Post‐test population n P‐value (two tailed student's t‐test)
Stainless Steel 2·2 × 106 2·5 × 106 10 pretest, 10 post‐test 0·1297
Glass 2·0 × 106 2·2 × 106 3 pretest, 3 post‐test 0·2499
Wood 9·6 × 105 4·6 × 105 3 pretest, 3 post‐test 0·0659