Table 1.
Demographic characteristics for questionnaire and time-use diary samples at 2, 4, and 6 months of age
| Demographic characteristics | Questionnaire (n = 250) | Time-use diary(n = 94) | ||||
|---|---|---|---|---|---|---|
| 2 month | 4 month | 6 month | 2 month | 4 month | 6 month | |
| Infant age (days) | 66.58(5.79) | 127.39(8.10) | 186.40(7.14) | 67.09(5.62) | 126.49(7.22)c | 185.29(5.51)c |
| Infant sex | ||||||
| Male | 109(43.6) | - | - | 41(43.6) | - | - |
| Female | 141(56.4) | - | - | 53(56.4) | - | - |
| Infant race/ethnicity | ||||||
| Caucasian | 132(52.8) | - | - | 59(62.8) | - | - |
| Other | 118(47.2) | - | - | 35(37.2) | - | - |
| Number of siblings | ||||||
| Zero | 116(46.4) | - | - | 53(56.4) | - | - |
| One | 98(39.2) | - | - | 31(33.0) | - | - |
| Two or more | 36(14.4) | - | - | 10(10.6) | - | - |
| Non-parental care (hours) | 1.95(10.10) | 2.43(7.26) | 2.67(6.65) | 1.14(3.35) | 1.69(3.90)c | 2.07(4.51)c |
| Parental age (years) | 32.62(5.03)a | 32.56(4.85)b | 32.69(4.78)b | 32.29(4.22) | 32.44(4.15)d | 32.52(4.00)d |
| Parental marital status | ||||||
| Married or living common-law | 241(96.4) | - | - | 90(95.7) | - | - |
| Not married or living common-law | 9(3.6) | - | - | 4(4.3) | - | - |
| Parental education | ||||||
| Above bachelor’s degree | 62(24.8) | - | - | 25(26.6) | - | - |
| A bachelor’s degree | 98(39.2) | - | - | 41(43.6) | - | - |
| Below a bachelor’s degree | 90(36.0) | - | - | 28(29.8) | - | - |
| Parental country of birth | ||||||
| Canada | 173(69.2) | - | - | 75(79.8) | - | - |
| Other country | 77(30.8) | - | - | 19(20.2) | - | - |
Data presented as mean (standard deviation) for continuous variables and frequency (percentage) for categorical variables
aMean imputation was performed for missing parental age at baseline (n = 1)
b n = 249
c n = 91
d n = 90