Table 1.
Demographic data and impact of propensity weighting
| SRC: CMV+ | SRC: CMV− | CC: CMV+ | CC: CMV− | SRC versus CC | CMV+ versus CMV− (pre-IPTW) | CMV+ versus CMV− (post-IPTW) | |
|---|---|---|---|---|---|---|---|
| n | 30 | 58 | 21 | 52 | – | – | – |
| Age | 19.58 (1.82) | 18.89 (1.79) | 19.82 (1.38) | 19.33 (1.94) | t(159) = −1.22, P = 0.22 | F(1159) = 3.63, P = 0.058 | F(1159) = 0.05, P = 0.83 |
| Race (n White) | 17 | 48 | 15 | 41 | χ2 = 0.17, P = 0.68a | χ2 = 5.97, P = 0.015a | χ2 = 0.25, P = 0.62a |
| Ethnicity | |||||||
| n Hispanic or Latino | 4 | 2 | 3 | 1 | OR = 1.26, P = 0.73b | OR = 6.04, P = 0.013b | OR = 0.80, P = 0.58b |
| n Unknown or not reported | 2 | 4 | 3 | 2 | OR = 1.01, P = 0.99b | OR = 2.16, P = 0.23b | OR = 1.18, P = 0.72b |
| n Not Hispanic or Latino | 24 | 52 | 15 | 49 | – | – | – |
| WTAR SS | 91.88 (16.27) | 102.97 (12.08) | 95.90 (9.91) | 100.71 (13.19) | t(159) = −0.07, P = 0.95 | F(1159) = 14.27, P < 0.001 | F(1159) = 0.03, P = 0.87 |
| SES | 42.62 (12.35) | 42.56 (12.32) | 40.52 (12.59) | 42.15 (12.25) | t(159) = 0.46, P = 0.65 | F(1159) = 0.09, P = 0.77 | F(1159) = 0.02, P = 0.89 |
| Prior Con | 0.57 (0.68) | 1.22 (1.46) | 0.57 (1.21) | 0.71 (0.96) | χ2 = 5.00, P = 0.03c | χ2 = 6.82, P = 0.009c | χ2 = 1.52, P = 0.22c |
| BMI | 28.93 (5.47) | 29.14 (6.04) | 28.81 (5.63) | 28.70 (5.05) | t(159) = 0.38, P = 0.70 | F(1159) = 0.00, P = 0.96 | F(1159) = 0.53, P = 0.47 |
Mean (standard deviation) shown in each cell unless indicated. P < 0.05 results are bolded. BMI = body mass index; CC = contact control; CMV = cytomegalovirus; IPTW = inverse probability treatment weighting; OR = odds ratio; Prior Con = prior concussion; SES = socioeconomic status; SRC = sport-related concussion; WTAR SS = Wechsler Test of Adult Reading standard score.
Binomial distribution.
Multinomial distribution with ‘Not Hispanic or Latino’ as reference.
Poisson distribution.