Mean respiratory epithelial cell yield among volunteers sampled by collecting NPS and NS using flocked or rayon swabsa

Swab type (n)Geometric mean no. of respiratory epithelial cells/hpf (95% CI)P
Flocked swab (P = 0.03)Rayon swab (P = 0.38)
NPS (15)58.6 (45.7-75.1)23.9 (13.2-43.5)0.02
NS (16)31.3 (20.1-48.6)15.2 (9.1-25.5)0.03
  • a P values were determined by using a paired t test on log-transformed values. n, number of volunteers swabbed.