Table 3.
Factors associated with sleep duration, CLHLS, 2005
| Model I | ≤ 5 h vs 8 h | 6 h vs 8 h | 7 h vs 8 h | 9 h vs 8 h | ≥ 10 h vs 8 h |
|---|---|---|---|---|---|
| Ages 80-89 (ages 65-79) | 1.30 (1.13,1.50)*** | 1.10 (0.96,1.25) | 0.86 (0.75,0.99)* | 1.03 (0.87,1.22) | 2.15 (1.90,2.44)*** |
| Ages 90-99 (ages 65-79) | 1.15 (0.99,1.34) | 1.18 (1.03,1.36)* | 0.89 (0.77,1.02) | 1.03 (0.86,1.22) | 3.39 (2.99,3.84)*** |
| Ages 100+ (ages 65-79) | 1.35 (1.13,1.61)** | 1.21 (1.02,1.44)* | 0.84 (0.70,1.00) | 1.23 (0.99,1.52) | 5.46 (4.74,6.30)*** |
| Men | 0.75 (0.66,0.84)*** | 0.80 (0.72,0.89)*** | 0.83 (0.75,0.93)** | 1.04 (0.91,1.19) | 0.92 (0.84,1.01) |
| Han ethnicity | 0.92 (0.72,1.17) | 1.04 (0.83,1.32) | 0.90 (0.71,1.13) | 0.99 (0.75,1.31) | 1.07 (0.88,1.31) |
| Urban | 1.01 (0.90,1.13) | 0.99 (0.89,1.11) | 1.01 (0.91,1.13) | 0.95 (0.83,1.09) | 0.83 (0.75,0.91)*** |
| Northeast (north) | 1.07 (0.80,1.44) | 1.04 (0.79,1.38) | 1.10 (0.83,1.45) | 0.96 (0.68,1.37) | 1.06 (0.84,1.35) |
| East (north) | 0.91 (0.71,1.17) | 0.91 (0.72,1.15) | 1.02 (0.81,1.30) | 1.15 (0.86,1.56) | 1.02 (0.83,1.25) |
| Central/South (north) | 0.91 (0.70,1.18) | 1.00 (0.79,1.28) | 0.91 (0.71,1.17) | 1.17 (0.86,1.60) | 0.92 (0.75,1.13) |
| West (north) | 1.15 (0.89,1.50) | 0.98 (0.76,1.26) | 0.81 (0.62,1.05) | 0.66 (0.47,0.93)* | 0.65 (0.52,0.81)*** |
| Model II | |||||
| Ages 80-89 (ages 65-79) | 1.13 (0.97,1.32) | 1.00 (0.86,1.15) | 0.84 (0.72,0.97)* | 1.04 (0.87,1.25) | 1.88 (1.64,2.15)*** |
| Ages 90-99 (ages 65-79) | 0.96 (0.81,1.14) | 1.03 (0.88,1.21) | 0.85 (0.72,0.99)* | 1.05 (0.87,1.27) | 2.78 (2.42,3.20)*** |
| Ages 100+ (ages 65-79) | 1.10 (0.90,1.34) | 1.04 (0.86,1.26) | 0.80 (0.65,0.98)* | 1.27 (1.00,1.60)* | 4.33 (3.68,5.09)*** |
| Men | 0.88 (0.76,1.02) | 0.93 (0.81,1.06) | 0.90 (0.79,1.04) | 0.99 (0.83,1.16) | 1.03 (0.91,1.15) |
| Han ethnicity | 0.95 (0.75,1.21) | 1.06 (0.84,1.33) | 0.90 (0.71,1.13) | 0.99 (0.75,1.32) | 1.09 (0.90,1.33) |
| Urban | 1.06 (0.95,1.20) | 1.00 (0.89,1.11) | 1.02 (0.91,1.14) | 0.95 (0.83,1.09) | 0.83 (0.75,0.91)*** |
| Northeast (north) | 1.06 (0.79,1.42) | 1.05 (0.79,1.39) | 1.10 (0.83,1.45) | 0.95 (0.67,1.37) | 1.07 (0.84,1.36) |
| East (north) | 0.89 (0.69,1.14) | 0.90 (0.71,1.14) | 1.01 (0.80,1.29) | 1.14 (0.84,1.55) | 1.03 (0.84,1.26) |
| Central/South (north) | 0.84 (0.65,1.09) | 0.97 (0.76,1.24) | 0.90 (0.70,1.15) | 1.18 (0.86,1.60) | 0.93 (0.75,1.14) |
| West (north) | 1.11 (0.85,1.44) | 0.97 (0.75,1.25) | 0.81 (0.62,1.05) | 0.65 (0.46,0.91)* | 0.65 (0.52,0.81)*** |
| 1+ years of schooling | 0.95 (0.83,1.09) | 0.93 (0.82,1.05) | 0.94 (0.83,1.07) | 0.99 (0.85,1.16) | 0.96 (0.86,1.07) |
| Good family economic condition | 0.69 (0.58,0.81)*** | 0.84 (0.72,0.97)* | 0.91 (0.79,1.05) | 1.01 (0.85,1.21) | 0.99 (0.87,1.11) |
| Got adequate medical service | 0.50 (0.43,0.60)*** | 0.79 (0.67,0.94)** | 0.93 (0.78,1.12) | 1.11 (0.88,1.41) | 0.97 (0.83,1.13) |
| Married | 0.78 (0.67,0.91)** | 0.87 (0.76,1.00) | 0.99 (0.86,1.14) | 1.02 (0.86,1.21) | 0.68 (0.60,0.77)*** |
| No. of living children | 1.01 (0.98,1.04) | 0.97 (0.94,1.00) | 0.99 (0.96,1.02) | 1.01 (0.97,1.04) | 0.99 (0.97,1.01) |
| Live with spouse/family (alone) | 0.92 (0.78,1.09) | 0.93 (0.79,1.09) | 0.93 (0.79,1.10) | 0.97 (0.79,1.19) | 1.21 (1.05,1.40)** |
| Institutionalized (alone) | 1.75 (1.21,2.53)** | 1.47 (1.03,2.12)* | 1.08 (0.72,1.62) | 1.30 (0.81,2.09) | 1.44 (1.04,2.00)* |
| Current smoker | 0.85 (0.73,0.99)* | 0.87 (0.75,1.01) | 0.90 (0.70,1.15) | 1.13 (0.95,1.35) | 1.00 (0.88,1.13) |
| Current alcohol user | 0.95 (0.82,1.10) | 0.86 (0.75,0.99)* | 0.81 (0.62,1.05) | 1.06 (0.90,1.25) | 1.03 (0.92,1.16) |
| Model III | ≤ 5 h vs 8 h | 6 h vs 8 h | 7 h vs 8 h | 9 h vs 8 h | ≥ 10 h vs 8 h |
| Ages 80-89 (ages 65-79) | 0.95 (0.81,1.13) | 0.93 (0.79,1.08) | 0.84 (0.72,0.98)* | 1.07 (0.89,1.30) | 1.56 (1.35,1.79)*** |
| Ages 90-99 (ages 65-79) | 0.76 (0.63,0.92)** | 0.93 (0.78,1.10) | 0.86 (0.72,1.03) | 1.08 (0.87,1.35) | 2.02 (1.72,2.37)*** |
| Ages 100+ (ages 65-79) | 0.76 (0.61,0.95)* | 0.87 (0.70,1.08) | 0.82 (0.66,1.03) | 1.29 (0.98,1.68) | 2.68 (2.23,3.22)*** |
| Men | 0.92 (0.80,1.07) | 0.95 (0.83,1.09) | 0.91 (0.79,1.04) | 0.98 (0.83,1.15) | 1.07 (0.95,1.21) |
| Han ethnicity | 0.85 (0.67,1.08) | 1.00 (0.79,1.26) | 0.90 (0.71,1.13) | 1.00 (0.75,1.32) | 1.02 (0.84,1.25) |
| Urban | 1.03 (0.91,1.16) | 0.97 (0.87,1.09) | 1.01 (0.90,1.13) | 0.95 (0.82,1.09) | 0.80 (0.78,0.88)*** |
| Northeast (north) | 1.05 (0.78,1.41) | 1.05 (0.78,1.41) | 1.10 (0.83,1.46) | 0.95 (0.66,1.36) | 1.05 (0.83,1.34) |
| East (north) | 0.92 (0.71,1.18) | 1.04 (0.79,1.38) | 1.01 (0.79,1.28) | 1.16 (0.86,1.57) | 1.12 (0.91,1.38) |
| Central/South (north) | 0.91 (0.70,1.18) | 0.92 (0.72,1.17) | 0.90 (0.70,1.16) | 1.20 (0.88,1.63) | 1.06 (0.86,1.32) |
| West (north) | 1.21 (0.92,1.59) | 1.02 (0.80,1.31) | 0.81 (0.62,1.06) | 0.66 (0.47,0.93)* | 0.73 (0.58,0.91)** |
| 1+ years of schooling | 0.97 (0.84,1.11) | 1.03 (0.80,1.33) | 0.93 (0.82,1.06) | 0.99 (0.84,1.16) | 0.98 (0.87,1.09) |
| Good family economic condition | 0.76 (0.64,0.90)** | 0.86 (0.74,1.00) | 0.90 (0.78,1.05) | 1.01 (0.85,1.20) | 1.04 (0.92,1.18) |
| Got adequate medical service | 0.64 (0.54,0.76)*** | 0.87 (0.73,1.03) | 0.93 (0.78,1.13) | 1.09 (0.86,1.39) | 1.07 (0.92,1.25) |
| Married | 0.79 (0.67,0.91)** | 0.87 (0.76,1.00) | 0.99 (0.96,1.14) | 1.01 (0.85,1.20) | 0.70 (0.62,0.80)*** |
| No. of living children | 1.01 (0.98,1.04) | 0.97 (0.94,1.00) | 0.99 (0.96,1.02) | 1.01 (0.97,1.04) | 0.99 (0.96,1.01) |
| Live with spouse/family (alone) | 0.90 (0.75,1.06) | 0.90 (0.78,1.04) | 0.94 (0.79,1.11) | 0.96 (0.78,1.18) | 1.11 (0.96,1.28) |
| Institutionalized (alone) | 1.60 (1.10,2.33) | 1.40 (0.97,2.01) | 1.08 (0.72,1.62) | 1.29 (0.81,2.09) | 1.27 (0.91,1.77) |
| Current smoker | 0.92 (0.79,1.08) | 0.90 (0.78,1.04) | 0.90 (0.77,1.04) | 1.13 (0.95,1.35) | 1.05 (0.92,1.19) |
| Current alcohol consumer | 1.06 (0.91,1.23) | 0.90 (0.77,1.05) | 0.93 (0.81,1.07) | 1.05 (0.89,1.24) | 1.11 (0.98,1.25) |
| IADL disabled | 1.35 (1.15,1.57)*** | 1.13 (0.98,1.30) | 0.99 (0.86,1.14) | 0.89 (0.75,1.05) | 1.28 (1.13,1.45)*** |
| ADL disabled | 1.14 (0.96,1.34) | 1.19 (1.02,1.40)* | 0.97 (0.82,1.15) | 1.16 (0.95,1.42) | 1.65 (1.45,1.88)*** |
| Cognitively impaired | 1.10 (0.95,1.27) | 0.99 (0.86,1.13) | 0.99 (0.86,1.14) | 1.00 (0.83,1.19) | 1.16 (1.03,1.30)* |
| Self-rated poor health | 2.10 (1.82,2.70)*** | 1.30 (1.13,1.51)*** | 0.95 (0.81,1.11) | 0.94 (0.77,1.15) | 1.30 (1.15,1.47)*** |
| Have 1+ chronic diseases | 1.78 (1.55,2.02)*** | 1.36 (1.21,1.52)*** | 1.11 (0.99,1.24) | 0.99 (0.86,1.13) | 1.12 (1.01,1.24)* |
| Often anxious | 2.02 (1.57,2.60)*** | 1.36 (1.04,1.78)* | 1.33 (1.00,1.75)* | 0.91 (0.63,1.34) | 0.98 (0.76,1.26) |
Numbers in the table are odds ratios and the 95% confidence intervals (in parentheses) based on multinomial logistic regression. The category in the parentheses is the reference for those categorical variables. All other variables are dichotomous.
*
P < 0.05;
**
P < 0.01;
***
P < 0.001.