Table 1. Comparison of demographic profiles of the respondents.
| variable | False-Positive (N = 49) | Normal-screened (N = 42) | pa |
| Parents' age, mean (SD)b, mo | 29.7 (6.32) | 28.9 (6.15) | 0.75 |
| Child male, n (%) | 26 (53) | 22 (52) | 0.80 |
| Child first-born, n (%) | 35 (71) | 33 (79) | 0.22 |
| Chinese race, n (%) | 47 (96) | 40 (95) | 0.83 |
| Married families, n (%) | 46 (94) | 41 (98) | 0.68 |
| Child age at evaluation, mean (SD), mo | 12.4 (3.2) | 6.7 (1.2) | <0.001 |
| Family income (RMB/Year)c, n (%) | |||
| 28,000 or less | 19 (40) | 12 (29) | <0.001 |
| 28,000–88,000 | 17 (36) | 15 (37) | 0.76 |
| 88,000 or more | 11 (24) | 14 (34) | <0.001 |
| Education backgroundd, n (%) | |||
| High school or less | 46 (68) | 30 (53) | <0.001 |
| College or more | 22 (32) | 27 (47) | <0.001 |
a
Fisher's exact test for dichotomous variables and Student's unpaired t-test for continuous variables.
b
N = 70 in the False-Positive group, 59 in the Normal-screened group.
c
N = 47 in the False-Positive group, 41 in the Normal-screened group; 1 U.S. dollar = 6.311 RMB.
d
N = 68 in the False-Positive group, 57 in the Normal-screened group.