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Table 4 Zero-inflated negative binomial model for number days of sick leave before pathological and legal maternity leaves

From: Exposure to occupational hazards for pregnancy and sick leave in pregnant workers: a cross-sectional study

  Logistic portiona Negative binomial portion
  βb 95% CI p Probability of being an extra zero βb 95% CI p Adjusted mean NOLDc Difference (factor-intercept)c
Intercept 0.92 −0.08 – 1.91 0.07 0.71 3.46 3.06 – 3.87 <0.001 31.9 0
Number of occupational risks
 1 or 2 risks vs 0 risk −0.44 −0.83 – -0.06 <0.001 0.62 0.19 0.03 – 0.35 <0.001 38.6 +06.7
 3 or 4 risks vs 0 risk −0.74 −1.23 – -0.24 0.54 0.38 0.19 – 0.57   46.8 +14.9
  ≥ 5 risks vs 0 risk −1.05 −1.54 – -0.57 0.46 0.52 0.35 – 0.70   53.8 +21.9
Work-family conflict
 1 risks vs 0 risk 0.14 −0.23 – 0.52 0.35 0.74 0.20 0.04 – 0.35 0.03 38.8 +6.9
 2 risks vs 0 risk −0.14 −0.60 – 0.32   0.68 0.23 0.06 – 0.39   40.0 +8.1
  ≥ 3 risks vs 0 risk −0.33 −0.99 – 0.34   0.64 0.21 0.01 – 0.41   39.4 +7.6
Deprivation (EPICES score ≥ 30)
 Yes vs no −0.17 −0.59 – 0.25 0.42 0.68 0.17 0.04 – 0.31 0.01 37.9 +6.0
Working time
 Full-time vs part-time 0.15 −0.24 – 0.53 0.46 0.74 −0.15 −0.29 – -0.01 0.03 27.4 −4.5
Home-work commuting felt as difficult
 Yes vs no    <0.001 0.53 0.09 −0.04 – -0.22 0.17 35.0 +3.1
Pregnancy at risk
 Yes vs no −1.26 −1.72 – -0.80 <0.001 0.41 0.42 0.29 – 0.54 <0.001 48.3 +16.5
 Company size (workers)
  ≥ 50 -199 vs ≥ 200 0.64 0.09 – 1.18 0.02 0.68 0.07 −0.12 – 0.25 0.34 34.0 +2.1
 10 – 49 vs ≥ 200 0.69 0.17 – 1.20   0.83 0.02 −0.14 – 0.19   32.7 +0.8
  < 10 vs ≥ 200 0.29 −0.25 – 0.82   0.77 −0.08 −0.24 – 0.09   29.4 −2.4
Type of contract
 Fixed-term vs non-fixed term −1.03 −1,71 – -0.35 0.003 0.47 0.26 −0.06 – 0.58 0.11 41.2 +9.4
  1. RRa ajusted relative risk, 95% CI 95% confidence intervals, p p-value, NOLD number of sick leave days vs: versus
  2. aModeling the probability of being an extra zero
  3. bAjusted for: number of occupational risks (0, 1 or 2, 3 or 4, ≥5 risks), number of home-work conflicts (0, 1, 2, ≥3 risks), deprivation EPICES score ≥ 30 (yes/no), pregnancy at risk (yes/no), working time (full-time, part-time), company size (<10, 10–49, ≥ 50 – 199,≥ 200 workers), type of contract (non-fixed term, fixed term), home-work commuting felt as difficult (yes/no)
  4. cin days