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Table 3 Relative hazards of mortality for the interaction between sleeping hours (per day) and vegetable consumption, CLHLS, the 2008–2014 panel

From: Sleep duration, vegetable consumption and all-cause mortality among older adults in China: a 6-year prospective study

  Total Women Men Young
old
Oldest old Rural Urban Illiterate Literate
Panel A
  ≤ 5 h and not often eating vegetables 1.08* 1.09+ 1.08 0.89 1.09* 1.07 1.11 1.08+ 1.07
 6 h and not often eating vegetables 1.08* 1.11* 1.05 1.03 1.08* 1.06 1.14* 1.08 1.10
7–8 h and not often eating vegetables 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
 9 h and not often eating vegetables 1.09+ 1.19** 0.96 0.79 1.11* 1.10 1.06 1.13* 0.98
  ≥ 10 h and not often eating vegetables 1.18*** 1.21*** 1.13** 1.16 1.18*** 1.15*** 1.21*** 1.19*** 1.13*
 High frequent intake of vegetables (low) 0.91** 0.96 0.82*** 0.95 0.90** 0.96 0.83*** 0.92* 0.85*
Panel B
  ≤ 5 h and not often eating vegetables 1.33*** 1.44** 1.19 1.00 1.33** 1.33** 1.32+ 1.37** 1.15
 6 h and not often eating vegetables 1.08 1.09 1.05 1.52 1.04 1.00 1.20 1.10 1.03
7–8 h and not often eating vegetables 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
 9 h and not often eating vegetables 0.90 0.91 0.85 0.75 0.90 0.88 0.96 1.04 0.60+
  ≥ 10 h and not often eating vegetables 1.33*** 1.42*** 1.20 1.27 1.34*** 1.23* 1.46** 1.32** 1.30+
  ≤ 5 h and often eating vegetables 1.02 1.10 0.89 0.94 1.02 1.02 1.02 1.03 0.95
 6 h and often eating vegetables 1.07 1.21* 0.89 1.05 1.08 1.07 1.07 1.09 1.00
 7–8 h and often eating vegetables 0.99 1.09 0.85+ 1.07 0.98 1.01 0.95 1.01 0.90
 9 h and not eating vegetables 1.09 1.33** 0.83+ 0.85 1.12 1.14 1.02 1.15+ 0.93
  ≥ 10 h and often eating vegetables 1.13* 1.27** 0.95 1.24 1.13* 1.16+ 1.11 1.18* 0.98
Panel C
  ≤ 5 h and not often eating vegetables 1.34*** 1.32** 1.40** 0.94 1.35** 1.31** 1.38** 1.36** 1.29+
 6 h and not often eating vegetables 1.10 1.02 1.24 1.42 1.06 0.99 1.27+ 1.09 1.15
 7–8 h and not often eating vegetables 1.01 0.92 1.18+ 0.93 1.02 1.00 1.05 0.99 1.12
 9 h and not often eating vegetables 0.91 0.84 1.00 0.70 0.92 0.87 1.00 1.02 0.66
  ≥ 10 h and not often eating vegetables 1.35*** 1.30*** 1.42*** 1.18 1.36*** 1.22* 1.53*** 1.29*** 1.45*
  ≤ 5 h and often eating vegetables 1.03 1.01 1.06 0.88 1.03 1.00 1.07 1.02 1.06
 6 h and often eating vegetables 1.08+ 1.11+ 1.05 0.98 1.09* 1.06 1.13+ 1.07 1.11
7–8 h and often eating vegetables 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
 9 h and not eating vegetables 1.11* 1.22** 0.98 0.79 1.14* 1.13+ 1.07 1.13* 1.04
  ≥ 10 h and often eating vegetables 1.15*** 1.17*** 1.12* 1.15 1.15*** 1.14** 1.17** 1.17* 1.10
 N (observations) 20,774 11,693 9081 6003 14,771 11,984 8790 13,017 7757
  1. Note: Relative hazards were obtained from parametric survival analyses. The reference group in Panel B is “7–8 h and not often eating vegetables”, whereas the reference group in Panel C is “7–8 h and often eating vegetables.” All models controlled for all covariates in Table 1. Relative hazards for all covariates were not presented. ***p < 0.001, **p < 0.01, *p < 0.05, +p < 0.1