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Table 3 Estimates of regression coefficients corresponding to various cofactors for different count models

From: Count data regression modeling: an application to spontaneous abortion

Models→ General Linear Models Zero Hurdle NB Model Zero Inflated NB model
Variables↓ Poisson Model Neg. Binomial Model Truncated NB Portion (Risk ratio) Hurdle Portion (Odds Ratio) Count Portion (Risk ratio) Zero inflation Portion (Odds Ratio)a
ANC Place
 Government Ref. Ref. Ref. Ref. Ref. Ref.
 Private 1.18 (.083) 1.17 (.070) 1.09 (.120) 1.01 (.231) 1.08 (.086) 1.00 (.172)
 Others 1.41*(.067) 1.47 **(.057) 1.56***(.097) 1.50*(.179) 1.59***(.069) 0.47*(.146)
Place of Residence
 Rural Ref. Ref. Ref. Ref. Ref. Ref.
 Urban 0.91 (.041) 0.91* (.033) 0.97* (.060) 0.94* (.182) 0.87** (.041) 1.12* (.082)
Age 1.01 (.002) 1.01 (.002) 1.04 (.004) 1.01 (.028) 1.03 (.002) 0.95 (.012)
Age at Marriage 0.98***(.007) 0.98***(.005) 0.96***(.011) 0.95* (.034) 0.98** (.007) 1.04* (.011)
Total Children 1.24 (.021) 1.38** (.017) 1.17***(.034) 1.19** (.074) 1.16***(.022) 0.92** (.046)
Education
 Illiterate Ref. Ref. Ref. Ref. Ref. Ref.
 Primary 1.02 (.049) 1.04 (.040) 0.89* (.079) 0.84 (.190) 0.99* (.050) 1.01 (.105)
 Secondary 1.02 (.054) 0.98 (.043) 0.89 (.084) 0.81 (.210) 0.91* (.054) 1.03 (.115)
 Higher 0.90 (.079) 0.90*(.063) 0.72***(.115) 0.58**(.410) 0.89***(.078) 1.20**(.160)
Religion
 Sikh Ref. Ref. Ref. Ref. Ref. Ref.
 Others 0.97 (.040) 0.95 (.032) 0.91 (.052) 0.92 (.174) 0.90* (.040) 1.15* (.088)
Caste
 SC/ST Ref. Ref. Ref. Ref. Ref. Ref.
 OBC 1.02 (.057) 1.02 (.045) 1.08 (.089) 1.11 (.227) 1.01 (.061) 0.98 (.114)
 General 1.02 (.042) 1.01 (.034) 1.08 (.065) 1.09 (.164) 1.01 (.042) 0.99 (.081)
Wealth Index
 Low Ref. Ref. Ref. Ref. Ref. Ref.
 Middle 0.94 (.067) 0.96 (.054) 0.91* (.098) 0.89* (.176) 0.90* (.071) 0.97* (.137)
 High 1.01 (.071) 1.10*(.056) 1.12* (.066) 1.09**(.061) 1.08***(.049) 0.89***(.050)
Media Exposure
 Yes Ref. Ref. Ref. Ref. Ref. Ref.
 No 1.05* (.078) 1.05 (.064) 1.11 (.116) 0.95 (.265) 1.08 (.089) 0.97 (.163)
  1. a The odds ratio for number of SA in low risk group, Value in bracket () gives the S.E
  2. * Significant at 10% level (p-value < 0.10)
  3. ** Significant at 5% level (p-value < 0.05)
  4. ***Significant at 1% level (p-value < 0.01)